The invention discloses a POS machine dialing method and device, which relate to the field of network technology. The method includes identifying dialing mode parameters; performing DTMF dialing or pulse dialing according to the dialing mode parameters; if the dialing mode parameters are not set, performing DTMF dialing and / or pulse dialing attempt, after connecting, setting dialing mode parameter is corresponding dialing mode parameter, the present invention carries out POS machine dialing by setting dialing mode parameter, when dialing mode parameter is not set, then carry out DTMF dialing and / or pulse dialing attempt, after connecting, set the dialing mode parameter to the corresponding dialing mode parameter, so that the user does not need to manually set the dialing mode, further, through the dialing parameter self-adaptation, it is more convenient for the user to use and improves the dialing efficiency.