The invention provides a mixed picture time delay measurement method and system, a computer readable medium and equipment. The method comprises the following steps: obtaining timing data in each pieceof video data of a mixed picture stream, wherein the mixed picture stream comprises a plurality of pieces of video data, and the plurality of pieces of video data are synchronously timed, and utilizing timing data in first video data and timing data in second video data to calculate and obtain mixed picture time delay of the first video data and the second video data, wherein the first video dataand the second video data are any two pieces of video data in the mixed picture stream. The purpose of testing the mixed picture time delay of the multi-user interactive live broadcast is achieved.