Abstract: This paper presents a microcomputer air-conditioning energy-conserving controller. It conserves energy on the basis of the mechanism of conserving energy comfortably. A single-board microcomputer is applied to a temperature regulating air-conditioner to meet the need of energy conservation by means of the multivalue regulating method of programming on time. The controller is applied to a window air-conditioner. It can conserve energy by 30%, and lengthen the service life of the conditioner ay 20%.