The invention relates to a modular underwater intelligent unmanned equipment system, and belongs to the field of underwater unmanned systems. The system comprises a surveying vessel, a navigation communication satellite and a modular underwater intelligent equipment platform cluster, the modular underwater intelligent equipment platform cluster forms a group network system by a modular underwater intelligent equipment platform according to task requirements and through intelligent ad hoc networking of a group intelligent technology, and the system has the capabilities of group collaborative decision-making, dynamic task division and the like. The system has six working modes: a line patrol measurement mode, a seabed operation mode, a multi-body cooperation mode, a dragging measurement mode, an underwater glider mode and a navigation communication relay mode. The system can realize most functions of various existing underwater unmanned systems, has the advantages of multiple functions, modularization, standardization, intelligence, high robustness and the like, can well solve the problems of low standardization and poor interchangeability of current underwater unmanned equipment, and promotes rapid, high-quality and systematic development of an underwater intelligent unmanned equipment system.