Unlocking system and method and cloud management platform

The invention provides an unlocking system and method and a cloud management platform. The unlocking system comprises a mobile terminal, a lockset and the cloud management platform; the cloud management platform is used for saving a corresponding relation between legal sound characteristics and identification information of the lockset, receiving an unlocking request which is sent from the mobile terminal and carries an identifier of the current lockset, generating current specified content and sending the current specified content to the mobile terminal, wherein recording data sent by the mobile terminal is received, whether the recording data is matched with the current specified content or not is verified, if yes, the current sound characteristics are acquired according to the recording data, whether the current sound characteristics and the identifier of the current lockset have the corresponding relation or not is judged, and if yes, an unlocking instruction is sent to a processing unit. According to the