A die casting die monitoring system based on Raspberry Pie and Machine Vision was developed based on the actual running status monitoring of die casting mould. The results show that the system can monitor the changes of temperature, pressure and lubrication parameters during the die casting process in real time. The film cavity surface image of die casting mold collected by industrial camera is processed by intelligent algorithm to judge the residue distribution in the film cavity. The visual integration of the monitoring system is in the Web end, and the status information of the die casting mold can be checked in real time by logging in the system remotely. The implementation and deployment process of the system is simple, and the labor cost is effectively reduced, which provides beneficial reference for the intelligent production process of die casting mold.