Having the characteristics of strong control function，high reliability，small volume and low cost， Microcontroller unit(MCU) has broad application prospect in intelligent instruments and apparatus，industrial measuring and controlling system，and home appliances． Almost all of universities and colleges provide MCU course，namely the principle and application of MCU． This course is a practical course，which needs a suit of experimental platform and experimental projects to support teaching and learning process．In the thesis，based on the requirement of auther’s work，the key technology problems in the design and implementation of multi-function MCU experimental and development board are studied.