1. A data source searching system, wherein the system is applied on a plurality of cloud servers, and the plurality of cloud servers are connected each other via network and store data, the system comprising: an input unit to generate a command for searching for a data source of data in response to user inputs; a creation time acquiring unit to acquire creation time of the data in each of the plurality of cloud servers in response to the command from the input unit; a locational area acquiring unit to acquire a locational area of each of the plurality of cloud servers; a time zone acquiring unit to acquire a time zone of each of the plurality of cloud servers based on the corresponding locational area from the locational area acquiring unit; and a determination unit to determine one of the plurality of cloud servers, which stores the data whose creation time is the earliest among the plurality of cloud servers based on the acquired time zone of each of the plurality of cloud severs, as the data source of the data.