Aspects of the present disclosure relate to cloud computing-based data sharing system and method, the system including a plurality of industrial device management units configured to transmit a recent shared data to a cloud server by periodically communicating with the cloud server, to receive a recent shared data of other industrial device management units received from the cloud server and to synchronize the shared data by updating the recent shared data to its own shared data, and a cloud server configured to compare a received shared data with a pre-stored shared data, in a case a shared data is received form an industrial device management unit among the plurality of industrial device management units through a communication network, to update its shared data as a result of the comparison, and to transmit a notification message including the updated shared data to other industrial device management unit through the communication network.