The invention relates to a power cable visual monitoring and maintenance management system based on a GIS, and the system comprises a cloud system, an Internet of Things platform, a database, an underground cable temperature measurement terminal, a setting module, an authority configuration module, a data element module, a database module, a geographic information analysis module, a device information analysis module, an underground resource information analysis module, a matching module, a modeling module, a layer drawing module, a visual application module, a layout management module, a data acquisition module, a multi-mode dynamic monitoring alarm module, a message management module. and a query and statistics module. According to the invention, the information of all underground power cable devices in the current environment can be visually and accurately restored, so that the maintenance work is more efficient and orderly, the low-efficiency and high-error manual operation in the process of matching the geographic information and the device information is avoided, and the subsequent planning and construction of overall power cable wiring are facilitated.