In order to facilitate quality control testing and pressure testing of ground observation software, this article simulates automatic meteorological station observation equipment based on serial communication, provides a ground meteorological observation data source interface, and realizes functions such as plug and play of observation equipment, intelligent adaptation and transmission of meteorological data, etc; By adopting excessive transmission technology, a large amount of efficient simulation observation data and equipment status data of various types including normal, suspicious, and incorrect are provided for observation software, and adaptability testing of ground meteorological observation software is carried out in application scenarios. The simulation and hardware equipment response speed are comparable, and the quality control and pressure testing of ISOS have been successfully completed. This application can serve the testing of methods, processes, and pressures in the development process of the next generation ISOS and related algorithms, playing a positive role in accelerating the development progress and improving software performance.