The present invention relates to a social network service (SNS) marketing system using an influencer capable of exercising influence on a market to secure potential consumers, which comprises: a plurality of client terminals for providing advertisement basic information including brand and product information on a client for performing an advertisement through an SNS, and receiving selection of condition information on an influencer; a plurality of influencer terminals each joined to the SNS; and a foam agency server for registering information on the client terminals and the influencer terminals, providing the client terminals with information on at least one of the influencer terminals corresponding to the condition information on the influencers among the pre-registered influencer terminals, generating advertisement information by combining advertisement image information received from the influencer terminals selected by the client terminals and the advertisement basic information, and providing the generated advertisement information for the influencer terminals. The influencer terminals manufacture the advertisement image information to provide the same for the foam agency server, and receives the advertisement information to upload the same to the SNS.
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