Abstract: This paper introduces a compact furnace for crystal growth in space,which temperature profile is program=controlled.The basis of this furnace is that,the furnace temperature profile changes automatically under the control of a computer system to implement the process of crystal growth,so there is no mechanical motion that would produce deleterious vibration to the microgravity environment.This furnace is constructed from 7 individual controlled heating zones.An advanced computer system,which is based on the Intel 80c31 micro-processor,is used for the temperature control of each heating zone (PID control) and the data collection.In the furnace,several different temperature profiles have been created.The performance of this furnace have been tested on earth,and the results show that it can be a precisely controlled,multi-purpose furnace for crystal growth in the Chinese returnable satellite.