A device access method applied to a host and includes: acquiring a connection request provided by a terminal, where the connection request comprises an identifier of the terminal and a password corresponding to the identifier, and the password is generated based on a private key in a key pair and the identifier; acquiring a verification result of the password, where the password is configured to be verified by a public key in the key pair; establishing a connection with the terminal in response to a successful verification; and rejecting the connection request of the terminal in response to a failed verification.