Direct-current power supply online monitoring system

The utility model relates to a remote automatic monitoring system, in particular to a direct-current power supply online monitoring system. The direct-current power supply online monitoring system is characterized by comprising an accumulator monitoring terminal, a switch power supply monitoring terminal, an insulation monitoring terminal, a temperature monitoring terminal and an environment monitoring terminal and being respectively connected with an intelligent equipment information acquisition terminal by RS232 or RJ45. The direct-current power supply online monitoring system monitors various indexes of a substation direct-current system in real time, leads maintenance personnel to master the operating conditions of all the substations in time, finds abnormal conditions early and eliminates the accidents in the bud. When encountering sudden emergencies such as failure of a charger, direct-current grounding, excessive high environment temperature, fire, water leakage, abnormity of equipment and the like, the remote automatic monitoring system can record and inquire in time and alarms automatically and quickly.