Based on single-chip simulation intelligent delivery device system physics and Electronic Information Engineering College of Electronic Information Engineering Specialty Instructor 08: Xie Chunmao pick to : the subjects come from the2011 country Nobunaga day cup microcontroller design and development of simulation examination questions. The intelligent transport system is the simulation of transport equipment in the transmission device, the main chip AT89S52as the main control chip, the four digital tube display circuit displays" goods" weight, analog to digital conversion circuit for8 bit analog-to-digital conversion, EEPROM storage circuits for storing cargo weight data, the buzzer for the overweight alarm, key control circuit control system start, reset, search, flip and transmission direction, can realize the weight of goods inspection, changing device transfer direction, overweight and overweight alarm record function. Keywords: intelligent AT89S52; simulation; transmission system The