The invention discloses a system and method for controlling solar photovoltaic power generation MPPT. The system comprises a solar photovoltaic parameter collecting module, an output electrical parameter collecting module, an intelligent control module and a setting module. The data output of the solar photovoltaic parameter collecting module and the data output end of the output electrical parameter collecting module are connected with the data input end of the intelligent control module. The setting module is a human-machine interface module and sets a control mode. The control method comprises a step S1 of reading set information; a step 2) of entering a set maximum power tracking control mode; and a step S3 of outputting regulation control signals according to control regulating results of the step S2. Different photovoltaic power generation tracking control modes are selected flexibly according to requirements, illumination intensity and temperature feedback intelligent closed-loop control can be selected in a targeted mode, variation serves as a field regulatory factor for variable domain fuzzy control, control response speed and tracking control precision are further improved, and the system can be applied and popularized in the field of solar photovoltaic power generation.