DATA MANAGING DEVICE

PROBLEM TO BE SOLVED: To reduce the load of communication traffic, respective servers and network by decreasing the number of times to reload data concerning communication between servers connected on the network. SOLUTION: A possession date 24 of data 23 to be accessed on a local server 20 is compared with a final update date/time 14 of data 13 at a DB server 10 and only, when the data 13 are updated after the data 13 are possessed at the local server 20, the data 13 are to be received so that the double reception of the same data can be prevented and unwanted data reception can be prevented. Further, when receiving the updated data 13, only an update log 12 is received and the data 23 of local server 20 are updated so that the amount of data to be received can be remarkably decreased and the load of network can be reduced.