On the market now there are many electronic clock,calendar and temperature measurement products,but the relatively high cost performance products do not,Several functional and this combination of products is even smaller.In this paper,as described in the above is a combination of several functions,and the relatively low cost products.Products through 17 digital control for the calendar,time and temperature display,allowing users to clearly understand these messages.10 built-in alarm group,each containing an alarm activation time and a time to stop,the music player can be controlled 2 Relay control.Below the product design for a general introduction.STC was designed with the MCU as a controller,with the clock chip DS1302 interactive,realize the time clock calendar function; with the temperature measurement DS18B20 interactive,at room temperature measurement function; with the digital CH452 driven interactive,clock,calendar and temperature display information in the digital pipe.STC SCM system with the internal flash alarm information for the power-off protection.Alarm design,the expansion of the right to broadcast music and relay control,as important matters to remind or other equipment (such as refrigerators,air conditioning,etc.) for timing control