The invention relates to an intelligent monitoring system of a distribution network switch cabinet. The system adopts an embedded installation technology to carry out intelligent monitoring on operation state of equipment in a switch station on the basis of an ultra-high-frequency partial discharge detection technology and a temperature monitoring technology. The problem of difficulty in real-time monitoring on the environment temperature and the equipment insulation state in the switch station cabinet is effectively solved. Equipment insulation state data is transmitted in real time; the partial discharge of a cable terminal, a busbar, a switch on-off device and the like in the switch cabinet caused by insulation defects or insulation aging can be monitored in real time; the development trend and the operation state of the insulation defects in a distribution network cabinet are monitored in real time; the insulation defects or faults which can become more severe can be discovered and warned in advance. When the system is put into operation, the safety operation level and the intelligent management level of the switch station can be greatly improved; serious power failures and fire accidents caused by the insulation defects of the equipment can be effectively avoided, and periodic detection is changed to be condition overhaul. The safety reliability and the automation degree of power system operation are improved.