The invention provides an overtime monitoring method and system. The system comprises a transmission end and a reception end, wherein the transmission end is used for storing a to-be-monitored content into an uncompleted set, transmitting the to-be-monitored content to the reception end, judging the quantity of to-be-monitored contents in the uncompleted set in a preset overtime monitoring time interval, and carrying out corresponding processing. According to the overtime monitoring method and system disclosed by the invention, inaccurate overtime detection is used, so that the overtime detection efficiency is greatly improved. Related specific information of overtime to-be-detected contents can be printed when the fact that the to-be-detected contents are overtime is detected, so that the developers can be helped to gather modes of the to-be-detected contents and then finally position the overtime reasons.