There are many distinguishing conditions and complex classification methods for key management, simplified management and registered management objects in the classified management directory of pollutant discharge permit, which is not conducive to the full implementation of the pollutant discharge permit. The classification analysis method is used to analyze the law of the pollutant discharge permit list, sort out the logical relationship of different discrimination conditions, make the logical relationship diagram, and carry out logical operation and software programming based on Java language to design the query software.