An application method of Petri net in aquatic products quality traceability system

based on radio frequency identification（RFID） is proposed

aiming at high transport costs and quality risk

etc

to construct high efficient seafood traceability and safety warning platform based on Iternet of things（Io T） technology.According to actual business flow and information flow of aquatic products

modeling is carried out based on Petri nets

and simulated by CPN Tools.Simulation result shows that the new modeling method is more simple and feasible

and can validate the effectiveness of a workflow model.With this new method

a workflow model is easily formalized and optimized in computers

and it is conductive to realize workflow management system and improve performance

efficiency of supply chain is improved

then cost of transportations and quality risk are reduced.