The invention relates to a data collection system for the shore power of a harbor, and the system comprises a data processor, a command receiving data transmitter, a protocol analysis module, a front-end system buffer, a front-end interface display server, and a terminal machine. The front-end system buffer is connected with a communication link management server, a front-end working condition maintenance server and a memory management module, and the memory management module is connected with a historical database. Compared with the prior art, the system achieves the unified collection of theelectrical data and harbor environment parameter data, which are collected by main control systems at different parts, of a harbor shore power system through a unified buffering and protocol separation method, facilitates the unified processing of the data, facilitates the overall monitoring of the shore power system, and achieves the comprehensive mastering of the conditions of the shore power system.