A method for authenticating access the method being applied in a third-party device and comprising: receiving a device identification of an accessed device and a user account of an access device sent from the access device; characterised in that the method further comprises: determining if the received device identification of the accessed device is bound to the received user account of the access device, and if not, determining the bound user account and sending an authentication request to a login terminal, which is an access device that has the owner permissions of the accessed device in that there is a binding relationship between the user account logged in on the login terminal and the device identification, of the user account bound with the device identification when detecting that the device identification has been bound with a user account and the user account of the access device is different from the user account bound with the device identification, wherein the authentication request is used to request for allowing the access device to access the accessed device; and sending an access password corresponding to the device identification to the access device after a permission access response fed back by the login terminal according to the authentication request is received, so that the access device accesses the accessed device according to the access password, wherein the permission access response is used to instruct to allow the access device to access the accessed device. receiving a device identification of an accessed device and a user account of an access device sent from the access device; characterised in that the method further comprises: determining if the received device identification of the accessed device is bound to the received user account of the access device, and if not, determining the bound user account and sending an authentication request to a login terminal, which is an access device that has the owner permissions of the accessed device in that there is a binding relationship between the user account logged in on the login terminal and the device identification, of the user account bound with the device identification when detecting that the device identification has been bound with a user account and the user account of the access device is different from the user account bound with the device identification, wherein the authentication request is used to request for allowing the access device to access the accessed device; and sending an access password corresponding to the device identification to the access device after a permission access response fed back by the login terminal according to the authentication request is received, so that the access device accesses the accessed device according to the access password, wherein the permission access response is used to instruct to allow the access device to access the accessed device. determining if the received device identification of the accessed device is bound to the received user account of the access device, and if not, determining the bound user account and sending an authentication request to a login terminal, which is an access device that has the owner permissions of the accessed device in that there is a binding relationship between the user account logged in on the login terminal and the device identification, of the user account bound with the device identification when detecting that the device identification has been bound with a user account and the user account of the access device is different from the user account bound with the device identification, wherein the authentication request is used to request for allowing the access device to access the accessed device; and sending an access password corresponding to the device identification to the access device after a permission access response fed back by the login terminal according to the authentication request is received, so that the access device accesses the accessed device according to the access password, wherein the permission access response is used to instruct to allow the access device to access the accessed device.