The invention, which relates to the streaming media field, discloses a screen display failure event detection method and detection system. The method comprises: a client receives data sent by a serverside and unpacks the data into TS sub packages; the TS sub packages are parsed and I-frame detection is carried out; when I frame detection is carried out, a byte number of a received current I frameis recorded; I frame detection is carried out continuously until a next I frame is detected, a time interval between detection of the current I frame and detection of the next I frame is calculated,and the received byte number within the time intervals is recoded; and according to the byte number of the received current I frame, the time interval between the detection of the current I frame anddetection of the next I frame, and the byte number received within the time interval, an I frame packet loss probability is calculated; whether the I frame packet loss probability is greater than a set first threshold; if so, a screen display failure event is detected; and otherwise, no screen display failure event is detected. The detection method has advantages of low computing load and reducedresource costs.