The invention provides a multi-way valve mounting system and mounting method. The multi-way valve mounting system comprises a rack, an acquisition mechanism used for identifying multi-way valve information, a material mechanism used for matching joint bodies according to the multi-way valve information, a controller used for controlling the multi-way valve mounting system to operate and a mountingmechanism used for mounting the joint bodies to multi-way valves. The acquisition mechanism, the material mechanism, the controller and the mounting mechanism are all arranged on the rack. The acquisition mechanism, the material mechanism and the mounting mechanism are all connected with the controller. The output end of the acquisition mechanism is connected with the input end of the mounting mechanism. The multi-way valve mounting system has the beneficial effects that through design combination of the acquisition mechanism, the material mechanism, the controller and the mounting mechanism,multi-way valve mounting system implements automatic matching and automatic mounting of the joint bodies and the types of the multi-way valves, potential quality hazards of mistaken taking and mistaken mounting of the joint bodies in the assembly process are eliminated, the production efficiency is improved, and the manual labor intensity is reduced.