The invention relates to the technical field of medicine, and particularly discloses a PET / CT distributive software system and medical equipment. The software system comprises five subsystems, i.e. a control console subsystem, an image processor subsystem, a CT collection rebuilding subsystem, a PET collection rebuilding subsystem and a main controller subsystem, both the control console subsystem and the image processor subsystem respectively adopt a four-layer architecture, the CT collection rebuilding subsystem, the PET collection rebuilding subsystem and the main controller subsystem adopt a three-layer architecture, the five subsystems are connected through a network topological structure, and the instruction communication and data transmission are realized by virtue of network communication. The system is clear in division, only two computers are respectively used for the collection rebuilding of PET and CT, so that the transmission time of original data can be shortened; moreover, the requirement on the performance of a control console also can be lowered; meanwhile, the development progress of software can be accelerated, the reliability of the software is improved, and stability in network communication can be realized.