The invention relates to the technical field of power system control and especially relates to an ASP.NET temperature black body control system and control method. According to the invention, an upper computer is used for control. The upper computer is connected with communication interfaces through a communication network so as to control a high temperature black body and a low temperature black body. Infrared devices are detected through parallel optical tubes and communication interfaces of the infrared devices are in feedback connection with the upper computer for data collection, comparison and analysis. According to the invention, automatic switching of testing standards and automatic adjustment of temperatures are realized and output accuracy is improved. Through automatic control and feedback through automatic collection and reading of measurement values and through software joining with a dynamic database, multiple times of loop computation of black body data and collected information of the infrared imaging devices are realized. Therefore, advantages of manageability, output buffer flexibility, mobile device compatibility, expansibility and usability, .NET Framework integrability, current ASP application program compatibility and the like of the system are realized.