Aerial camera is an important optoelectronic device and is widely used in aerial mapping, in order to detect the aerial camera conveniently and intuitively, a detecting instrument system mating a certain version aerial camera was designed and implemented. The function requirement of this detecting instrument system was given pointingto the assignment document of the onland support device and communication protocol between the camera and support device. The hardware constitution was designed refer to interface demand of the camera and computation demand of the system. A hierarchical architecture was put forward, at the same time, the key technology of the software system was discussed in detail, the running flow of the program was presented, and the design of the detecting instrument’s software was given all according to the software function demand, and the software was implemented using VC6.0. The testing flow was designed by the working method of detecting instrument, and it was exhaustively tested according to the testing flow, the detecting instrument was working well at all these tests. The testing result shows that the detecting instrument fulfills all the function demands, the detecting instrument works stably, operates conveniently, and shows intuitively, could be used in the onland support tasks of the aerial camera.