Abstract: It is an important means to get correct test data and evaluate the operation status of electric equipment by Drying damp secondary terminal box. In view of the shortcomings of traditional drying methods, such as difficult to control temperature and high risk of falling, an intelligent temperature control drying device was developed. Accurate temperature control is realized based on temperature acquisition and control module. At the same time, the dehumidification module is used to improve the air circulation speed in the secondary terminal box and accelerate the discharge of moisture. Theoretical analysis and field practice show that the device is simple in principle and convenient in operation, which can effectively improve the efficiency and safety of field operation, and has a good application prospect and promotion value.