Objective To develop an instrument that detects the behaviours of food and thrink of animals during pharmacological and bromatological experiments． Methods Consists of infrared sensors， Pressure sensors and Photoelectric sensors were used for signal conversion． Reduction motors were used for channels door control． A 51-Series microcontroller was used to control the experimental setup and record the results． Results We have developed a microcontroller-based instrument that can automatically detects the behaviours of food and thrink of animals during pharmacological and bromatological experiments． Conclusion Our experimental results with 30 mice indicate that the instrument developed provides an innovative tool for detecting the behaviours of food and thrink of animals．