The invention discloses a scheduling automation data checking system and method based on credible characteristic values. The system comprises a power grid data checking system. The power grid data checking system comprises a data preprocessing module, a credible characteristic value extracting module, a historical data and statistical data checking module based on the credible characteristic values, and a real-time data checking module. The method comprises: analyzing and preprocessing the rule of a large amount of historical data of the power grid scheduling automation system; extracting the credible characteristic values of the measured data; checking adverse historical data and statistical data; and checking and processing the power grid real-time data based on the credible characteristic values in combination with a power system characteristic. The scheduling automation data checking method based on credible characteristic values effectively identifies and checks adverse data according electrical equipment, the power system characteristic and the historical data, and improves the quality of power grid basic data.