The present disclosure provides a method, mainframe, system and apparatus for monitoring a played content, a medium and a device, which relates to the technical field of communications. The method includes: within a current monitoring time duration, acquiring a displayed-page screenshot from a displaying device, wherein the displayed-page screenshot is obtained by performing screen shooting to a displayed page of the displaying device; extracting a first content identification code from the displayed-page screenshot, wherein the first content identification code is for identifying a to-be-monitored content that is currently played; and based on the first content identification code, determining whether the to-be-monitored content is compliant. The method may be implemented by a playing controlling mainframe, thereby realizing monitoring the content played by the display screen at the edge side.