Abstract: Disclosed are a method and a system for making a payment to a third party using a communication client such as a mobile phone. The payment is made through an intermediary platform adapted for establishing communication between the communication client and the third-party subsystem. The intermediary platform receives a call-in request from the communication client, determines whether the communication client has a mobile telephone number, and further determines whether the mobile telephone number has a payment account bound therewith. If affirmative, the intermediary platform accepts a payment request from the communication client, and makes a deduction from the payment account in order to complete the payment. The intermediary platform may also be used to make a payment to the third-party through a network client such as a PC.