PURPOSE: A multilateral automatic collect call phone service method is provided to input a telephone number of a receiver from an originator, and to confirm whether the receiver wants to answer the phone, then to connect the receiver with the originator according to confirmed results. CONSTITUTION: A collect call system(40) inputs a receiver's telephone number, confirms whether a receiver telephone(60) wants to answer the phone, and connects an originator telephone(10) with the receiver telephone(60) according to confirmed results(S70). The collect call system(40) inputs a telephone number of the third receiver while connecting a call between an originator and a receiver(S71). The system(40) makes a call with the telephone number of the third party to confirm whether the third receiver receives the call of the originator(S72). The system(40) guides confirmed results through a voice or a signal sound(S73), and processes the confirmed results such that the third receiver can participate in the call(S74).
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