The invention discloses a method and system controlling play of a smart television on the basis of a home gateway. The method comprises the steps that the home gateway receives a login request of a managing user on the basis of a router, the television play requirement of the corresponding user is set on the basis of the login request, when the user plays the television, identity information of the user is judged, and the play time of the smart television is controlled on the basis of the television play requirement. The invention provides a method controlling the play time of the television intelligently. Due to high interaction performance, good service can be provided for the user, and user experience can be obviously improved. In addition, the system can provide a platform for parents who work in the day to monitor children in real time, the children are prevented from overindulging in television, and influence on health growth is avoided.