Abstract: The temperature tracer method plays a significant role in monitoring seepage. Comparative tests were implemented via a seepage monitoring system of the point heat source which can remove the effects of seepage direction, to study the monitoring effects influenced by the four factors on i.e. the integration approach of the sensing-heating unit, the geometrical dimension of the monitoring tube, the heating voltage and the heating time. Results show that both integration approaches of the sensing-heating unit chosen responded well in this study and the monitoring effects were weakened by increasing the distance between the monitoring tube and the sensing-heating unit. The test data also reveals that the monitoring results were closely relevant with the geometrical dimension of the monitoring tube while they were almost uncorrelated with the heating voltage and the heating time. Findings in this paper can promote the accuracy of seepage monitoring in order to prevent engineering accidents.