An input information reception unit of a server receives input information relating to a user operation from a client terminal and records the input information into an input information storage unit together with time. An information processing unit carries out an information process immediately on the basis of the input information, and an encoding unit encodes generated primary output data and a data transmission unit transmits the encoded data to the client terminal. An adjustment part adjusts processing contents and an encode parameter at any time in response to a communication situation monitored by a communication situation monitoring unit and records an adjustment history into an adjustment history storage unit together with the time.