温度是工业生产的重要参数之一，在化工、食品等诸多工业生产过程中必须对温度进行控制。随着控制理论和电子技术的发展，温度控制技术由传统的PID控制发展到高度智能化控制。其中以单片机为核心实现的数字控制器因其体积小、成本低、功能强、简便易行而得到广泛应用。本文主要阐述了基于单片机的温度控制系统的硬件组成、软件设计及相关的接口电路设计。-Industrial production temperature is one of the important parameters in the chemical, food and many other industrial processes must be carried out of temperature control. With the control theory and the development of electronic technology, temperature control technology from the development of the traditional PID control to a high degree of intelligent control. Among them, single-chip microcomputer as the core of the digital controller to achieve because of their small size, low cost, powerful, simple and widely used. In this paper, the single-chip microcomputer-based temperature control system hardware components, software interface design and circuit design.