Published information processing method and device, and information publishing system

Disclosed are a published information processing method and device, and an information publishing system. The method comprises: obtaining information to be published; determining whether the information to be published is the first piece of published information corresponding to a published service item; if yes, computing an encryption value of preset initial information using a preset encryption algorithm, and adding the encryption value of the preset initial information to the information to be published; if not, computing, by using the preset encryption algorithm, an encryption value of encryption data of previous published information comprising the information to be published, and adding the encryption value of the encryption data to the information to be published; and presenting, in a preset format, the information to be published to which the encryption value is added. The embodiments of the method or the device of the present application can improve the difficulty in falsifying published information, thereby ensuring the originality and the integrity of the published information and greatly improving the public credibility of the published information.