The invention relates to a WiFi-based information releasing, spreading and pushing method and system. A system platform is constructed in advance, and comprises a wireless AP, an intelligent WiFi client, and a cloud server. The method comprises the following steps: a user sends information keywords to be released to the wireless AP; the wireless AP generates a characteristic value string from the received information keywords; the characteristic value string is embedded into WiFi signals and broadcast; when receiving broadcasting with the characteristic value string, the intelligent WiFi client extracts the characteristic value string from the broadcasting, carries out similarity comparison, and acquires relevant information from the cloud server for pushing if the extracted characteristic value string is similar to the characteristic value string generated from the information keywords; and when receiving the broadcasting with the characteristic value string, a wireless AP of the same type extracts the characteristic value string from the broadcasting with the characteristic value string, and embeds the extracted characteristic value string into local WiFi signal broadcasting for forwarded broadcasting.