In the fields of auto-control, the requirement for dependability and intelligence of the instrument is often to be considered seriously. Since the capability of the electronic sensor and affect of the ambient temperature, the high dependability and intelligence is a hard aim to be reached. And the error through normal methods to design may be very large. The intelligence is poor. The article introduces the project process of making an Intelligent Electric Mini-car with high dependability and intelligence: which is consisted of SCM (single-chip microcomputer) SPCE061A, multiple kinds of sensors and some modules to support. Base on the SCM SPCE061A, the mini-car can identify different voice, record & play, race intellectually by the order of voice, dodge the barriers automatically and measure the distance accurately while running at different speed by introducing the PWM and the HALL speed sensor. At the same time, it has radar of backing a car, GPS (Global Position System) and the ability to detect alcohol in a motorman. To enhance the function of the mini-car, radiogram, MTV and LED of kinds of color is added, too. With the information displayed on the LCD and the voice register, it is easier to communicate with the mini-car. With the separate of circuit of controlling and electromotor, the stability of the system has improved. It has made good use of power to adopt 3.3V for the switch circuit and high efficiency PWM. Under the control of the voice order, it also can detect the real time and temperature meticulously. The project is adopting intelligent sensor and new SCM, which combined the multiple kinds of new intelligent electronic device, not only to measure the data for the system accurately, but also to communicate with us. At last the actual data of speed and distance is given to prove the feasibility of the project.