The invention relates to a playing method and a system of film and television programs, the system comprises a client and a provider, a user utilizes a user terminal device of the client to click a film which wants to be watched through a network, then whether the film is on demand and stored in a temporary computer in a temporary server group of the provider is judged, if yes, the temporary computer provides the film, if not, the search of whether the temporary computer with the empty memory exists in the temporary server group or not is carried out, if yes, the temporary computer provides the film, if not, the search of whether the idle temporary computer exists or not is carried out, if yes, the film in the idle temporary computer is deleted, the temporary computer extracts the film into the temporary computer from a storage device and the temporary computer provides the film, if not, the storage device directly provides the film, thereby allowing the transmission of the film to bemore smooth and enhancing the watching quality.