The embodiment of the invention relates to an advertisement data evidence storage method and device based on a block chain. The method comprises: receiving advertisement putting data sent by an advertisement terminal, wherein the putting data comprise browsing times; and after verifying the advertisement putting data, recording the advertisement putting data in the block chain. The delivery data of the advertisement is recorded in the block chain to realize evidence storage of the delivery data of the advertisement, and the delivery data of the advertisement can be queried in the block chain to determine the delivery condition. Therefore, the authenticity and credibility of the information can be improved, and whether the advertisement merchant is consistent with the
delivery mode of the
license in the actual business scene can be determined; therefore, the situation that the user experience is affected due to spoofing of consumers is avoided, and the consumers can also directly inquire the information on the block chain.