According to an embodiment of the present invention, a device for linking external social network services (SNSs)and transferring data between different SNSs comprises: a login linking unit to receive login information of a different SNS to allow a user to log in to a service even if separate login information is not inputted by the user; an integrated table generation unit to generate an integrated database table to integrate and store data related to the service and data related to the different SNS; a posting template forming unit to generate and transfer a posting by a created template when posting to the different SNS by the service; a message calling unit to call a desired message and data from the different SNS; a message posting unit to post data and a message for the different SNS from the service; a different data conversion unit to convert various data on an active SNS into data in accordance with a data format of a new SNS desiring activity; and an SNS CRM data management unit to store data on a currently active SNS, and realize a usable data API to be read and provided by the service if the usable data API is provided by the different SNS. An existing social provider can be used to have a community with users around the world in a short period of time to drastically reduce marketing and development costs.;COPYRIGHT KIPO 2019
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