1. Introduction Since the 1970s, technologies such as computers and microelectronics have developed rapidly. Driven by these advancements, and also to meet the new demands of modern industrial and agricultural production and even warfare, measurement technologies and instruments have continuously progressed, giving rise to intelligent instruments, PC instruments, VXI instruments, virtual instruments, and interchangeable virtual instruments, as well as their automatic testing systems. The boundaries between computers and modern instruments and equipment have become increasingly blurred, and the scope and range of measurement have continuously expanded. In the past decade, the emergence of network technologies, represented by the Internet, and their integration with other high-tech fields, have not only begun to bring intelligent Internet products into modern life, but have also brought unprecedented development space and opportunities to measurement and instrumentation technologies. Networked measurement technologies and new instruments with network functions have emerged. 2. Computer, microelectronics, communication, and network technologies are strong support for the emergence and rapid development of networked measurement technologies and instruments. 2.1 "The computer is the instrument" Since the rapid development of computer and microelectronic technologies has penetrated into the field of measurement and instrumentation technology, the landscape of this field has been constantly updated. The emergence of microcomputer-based instruments, including intelligent instruments, bus-based instruments, and virtual instruments, all leverage the software and hardware advantages of computers, thereby increasing measurement capabilities and improving technical performance. Since signals are converted into digital form after acquisition, much of the analysis and processing is performed by the computer, naturally blurring the lines between instruments and computers. In recent years, the increasing speed of new microprocessors, employing advanced technologies such as pipelined architecture, RISC architecture, and CacheE, has significantly improved the numerical processing capabilities and speed of computers. In data acquisition, the continuous upgrading and updating of technologies such as data acquisition cards, instrument amplifiers, and digital signal processing chips have effectively accelerated the rate and efficiency of data acquisition. Close integration with computer technology has become the mainstream trend in the development of instrumentation and measurement and control technologies. A specific analysis of microcomputer-based instruments reveals that a computer equipped with appropriate software and hardware can perform many of the functions of instruments and meters, essentially becoming a multi-functional general-purpose measuring instrument. The functionality of such modern instruments is no longer limited by the number of buttons and switches, but rather by the amount of software stored in their memory. In this sense, computers and modern instruments are increasingly converging, exhibiting a global interconnectedness. Based on this, some have proposed the concept that "computers are instruments" or "software is instruments." 2.2 "Computers are the backbone of measurement and control systems." The application of microcomputer-based instrument technologies such as bus-type instruments and virtual instruments has made it easier to build centralized and distributed measurement and control systems. However, centralized measurement and control is increasingly unable to meet the needs of complex, remote (distributed), and large-scale measurement and control tasks. Therefore, building networked measurement and control systems is essential, and the continuous upgrading and progress of computer software and hardware technologies provide increasingly superior technical conditions for building measurement and control networks. Unix, Windows Networked computer operating systems such as NT, Windows 2000, and Netware have facilitated the construction of networked testing systems. Standard computer network protocols, such as the OSI Open Systems Interconnection Reference Model (RM) and the TCP/IP protocol used on the Internet, offer significant advantages in openness, stability, and reliability, making it easy to implement the architecture of measurement and control networks. In terms of software development, toolkits for developing network applications are available from companies such as NI (LabVIEW and LabWindows/CVI), HP (VEE), and Microsoft (VB and VC). Software is crucial for the development of virtual instruments; for example, LabVIEW and LabWindows/CVI... LabVIEW/CVI boasts powerful functionality, simplifying virtual instrument development and providing reliable and convenient technical support for networking virtual instruments. LabVIEW/CVI includes a TCP class library, enabling the development of TCP/IP-based network applications. LabVIEW's TCP/IP and UDP network VIs can establish communication with remote applications, and its Internet Toolbox adds email, FTP, and Web capabilities to application systems. Remote automation VIs can also control distributed VIs that control other devices. LabVIEW 5.1 further enhances network functionality, improving the ability to develop network applications. Integrating hardware resources such as computers, high-end peripherals, and communication lines, as well as software resources such as large databases, programs, data, and files into a network enables resource sharing. Furthermore, increasing system redundancy through networked measurement and control systems improves system reliability and facilitates expansion and modification. A network with computers and workstations as nodes is essentially a network of modern instruments. Computers have become the backbone of modern measurement and control systems. 2.3 Network technology has increasingly become a key support for measurement and control technology to meet practical needs. In today's era, the rapid development of computer networks, represented by the Internet, and the increasing sophistication of related technologies have broken through the time and space limitations and geographical barriers of traditional communication methods, making communication over a wider area much easier. The hardware and software resources of the Internet are being applied in more and more fields, such as e-commerce, online education, telemedicine, remote data acquisition and control, remote real-time access to high-end measuring instruments and equipment, and remote equipment fault diagnosis, etc. At the same time, the continuous advancement of high-performance, high-reliability, and low-cost network interconnection devices such as gateways, routers, repeaters, and network interface chips has facilitated the interconnection between the Internet, different types of measurement and control networks, and enterprise networks. Utilizing existing Internet resources without establishing a dedicated topology network makes the construction of measurement and control networks, enterprise internal networks, and their interconnection with the Internet very convenient, paving the way for the widespread establishment and application of measurement and control networks. By embedding the TCP/IP protocol as an embedded application into the ROM of field intelligent instruments (mainly sensors), signal transmission and reception are both conducted via TCP/IP. In this way, the measurement and control system relies on the enterprise intranet for data acquisition, information dissemination, and system integration, interconnecting the measurement and control network with the enterprise intranet and the Internet, facilitating the unification of the measurement and control network and the information network. In this constructed measurement and control network, traditional instruments and equipment act as independent nodes, and information can be transmitted across the network to any accessible area. Real-time, dynamic (including remote) online measurement and control becomes a reality. Comparing this measurement technology with past measurement and control and testing technologies, it's easy to see that today's measurement and control can save a significant amount of field wiring and expand the geographical reach of the measurement and control system. The reason for the greatly simplified system expansion and maintenance is that the network plays an irreplaceable and crucial role in the execution and completion of these modern measurement tasks; that is, the network is truly involved in the entire process of modern measurement and control. Web-based information networks (Intranets) are currently the mainstream of enterprise intranets. Utilizing the open interconnection standards of the Internet, Intranets become open systems based on the TCP/IP protocol, easily connecting to the outside world, especially the Internet. Leveraging Internet technologies, Intranets bring great convenience to enterprise operations and management and have been widely used in various industries. The Internet is also beginning to have an increasingly significant impact on traditional measurement and control systems. Currently, the design philosophy of measurement and control systems is clearly influenced by computer network technology, based on principles such as networking, modularity, and openness. The control network has transformed from a traditional centralized model to a distributed model, becoming an open, interoperable, decentralized, and networked intelligent measurement and control system. Network nodes not only include computers and workstations but also intelligent measurement and control instruments. The measurement and control network will have an architecture and communication model similar to information networks. For example, the rapidly developing fieldbus in current measurement and control systems corresponds to the OSI model in its communication model, using intelligent instruments and devices in the field as nodes, connecting these nodes with instruments and control devices in the control room to form an organic measurement and control system. The functionality of the measurement and control network will far exceed the sum of the functions of each independent component in the system. The result is a significant enhancement in the functionality of the measurement and control system, and a marked expansion in its application areas and scope. The advent of Jini software technology aims to enable various electrical devices, measuring instruments, and devices using JAVA chips to connect to the internet. Jini software, along with simple programs written in Java, allows any networked instrument to perform its own functions while also being utilized by other instruments. The emergence of network technology is changing and will continue to change all aspects of people's lives. Specifically in the fields of metrology, measurement and control technology, and instrumentation, the networking of microcomputer-based instruments, the regional, national, and even global resource sharing of high-end measuring instruments and measurement information, the direct digital traceability and comparison of various levels of metrological standards across regions, remote data acquisition and control, remote equipment fault diagnosis, and automatic meter reading for electricity, water, gas, and heat, etc., are all inevitable results of the advancement of network technology and its comprehensive involvement in these processes.