Abstract: In view of shortcomings of a lot of transmission line, complicated construction, poor reliability and high cost by use of traditional detection method of remote switch, a design scheme of intelligent detection system for remote switch based on 1-wire was proposed. The system uses DS2405 1-wire device and C8051F single-chip microcomputer to constitute 1-wire sensor network with 128 switches and can detect open/close state of switch directly. The practical application showed that the system has advantages of simple circuit, strong anti-interference and high reliability.