This paper analyzes the demanding background of the tracked reconnaissance robot, and its requisite performance is discussed in detail. According to the demand, the miniature tracked reconnaissance robot (MTRR) is developed in BEIHANG University. The purpose of this paper is to discuss the application of the MTRR system and its modularization design methods. The meanings of modularization are that: structure modularization, control system modularization and software modularization. The MTRR system of small size and light weight is characterized with reconfiguration and portable performance. Furthermore, the system is provided with waterproof and shockresistant performance.