The invention discloses a power grid management system of a power grid geographical wiring diagram. The power grid management system comprises the power grid geographical wiring diagram (1), a mobile terminal (3), a wireless network (4), an application server (5), a data server (6), a computer device (7), a data platform (8), a scheduling communication network server (9), a two-dimensional code generating device (2). The two-dimensional code generating device (2) generates a two-dimensional code according to a diagram of a transformer station and a line, and a network address, stored in the data server (6), of video information. The two-dimensional code is printed on the power grid geographical wiring diagram (1). By scanning the corresponding two-dimensional code with the mobile terminal, the detailed diagram of the transformer station or the line and the video information can be checked or an operation instruction can be transmitted, thereby enlarging the information capacity and application range of the power grid geographical wiring diagram, achieving resource sharing, making convenient and fast data query, greatly improving work efficiency, effectively reducing cost, and improving work flexibility.