The intelligent comprehensive electric parameter meter is meticulously designed to meet the diverse requirements of the electric power system, industrial and mining enterprises, public facilities, intelligent buildings, and more. It leverages advanced large-scale integrated circuits to deliver exceptional performance. By employing an alternating current sampling algorithm, this device is capable of accurately measuring and calculating all essential electric power parameters. Additionally, it ensures precise measurements of common electric power parameters such as three-phase voltage, three-phase current, active power, reactive power, apparent power, frequency, power factor, four-quadrant electrical energy, accumulated active and reactive electrical energy, switching value input monitoring, and harmonic wave components ranging from the 2nd to the 31st order in a three-phase power grid. The meter also features communication interfaces, relay output control, electrical energy pulse output, and other advanced functionalities. This intelligent comprehensive electric parameter meter offers numerous extended functions for users to choose from, including two RS485 communication interfaces, four relay outputs, local or remote switching signal monitoring and control output ("remote control" functionality), and pulse output. Users can program it to output alarm signals or other custom control signals. With its exceptional performance-to-cost ratio, this meter serves as a highly efficient alternative to conventional electric transmitters, measuring instruments, energy meters, and related auxiliary units. As an advanced intelligent and digital power grid front-end acquisition element, it finds extensive application across various control systems, SCADA systems, energy management systems, substation automation, distribution grid automation, residential area power monitoring, industrial automation, intelligent buildings, intelligent switchboards, and switchgear cabinets. Its key advantages include convenient installation, easy wiring, minimal maintenance requirements, compact size, programmable input parameters, and seamless networking with industrial PLCs and industrial control computers through on-site communication software. This device not only meets the demanding needs of modern power systems but also stands out due to its versatility, reliability, and ease of integration into existing infrastructure. Whether used in commercial buildings, manufacturing facilities, or residential complexes, the intelligent comprehensive electric parameter meter provides unparalleled accuracy and efficiency, making it an indispensable tool for monitoring and managing electrical parameters in today's complex power networks.