The present invention relates to a technique for controlling the output of a management object data. In the past an output time of the original data can not be limited in the past. In this invention, output time of the management object data can be limited by using PC2. The PC2 is provided with time counter 208 for measuring the accumulation time for which a management object data is displayed by display 207, comparator 210 for comparing the upper limit time for which the output of the management object data is permitted and the accumulation time measured by time counter 208, and controller 205 for controlling the output of the management object data on the basis of the comparison results by comparator 208.