The temperature of the heating surface of the boiler is related to the safety of the boiler and the life of the boiler.The real-time monitoring of boiler wall temperature is the urgent requirement of thermal power plant.Through industrial configuration software design and development of boiler over-temperature alarm statistical system, the data acquisition, real-time monitoring and alarming statistics of boiler wall temperature are realized.The degree of boiler wall over-temperature has been quantified by introducing the degree of confidence.The system design is compact,use flexible and interface friendly, and the effect is good.