The invention discloses a joint inspection system for transformation equipment based on an intelligent robot and an application method thereof. The system comprises an inspection robot, a joint inspection device, a charging device and a centralized control platform, wherein the inspection robot is used for inspecting a transformer substation, collecting monitoring data of the joint inspection device and uploading the collected data to the centralized control platform in a wireless mode; the joint inspection device is used for being matched with the inspection robot to carry out joint inspection on the equipment state, the operating environment and the like, and comprises an intelligent sensor, a video monitoring sensor and an online monitoring device; the charging device is used for charging the inspection robot; and the centralized control platform is used for monitoring the operation of the inspection robot, analyzing, managing and displaying the detected data and carrying out management and control on the inspection mode. According to the invention, the existing monitoring resources are fully utilized, the comprehensiveness and diversity of data are improved, the inspection taskis dynamically adjusted, the utilization rate of the robot is improved, a data basis is provided for the comprehensive analysis of the equipment state, and the defect detection efficiency of the equipment is improved.