Abstract: Provided is a method of providing a billing and payment service using a settlement service function of a mobile electronic wallet, and a system therefor, which enables companies to charge customers for rates through their mobile devices, respectively, and enables the customers to directly pay for the rates using a settlement service function of a mobile electronic wallet without exposing banking information to a rate receipt institution on a regularly monthly basis. A rate guidance message is sent to a customer using a short message service (SMS) that is a wireless communication network service of a mobile device. If the customer confirms the guidance message, the mobile device automatically gains access to the rate demand company by call back URL or TCP/IP communication. Then, after undergoing a simple authentication procedure for confirming whether or not the access person is a true person, a rate bill including payment particulars is displayed on a screen of the mobile device.

Abstract: Provided is a method of and system for settling signatureless payment of a slip of bank card sales in a mobile terminal such as a cellular phone, a personal digital assistant, and a smart phone, having a mobile IC (Integrated Circuit) chip card, to then be printed on a transaction approval sales slip, to thereby make personal authentication completed and prevent the sales slip from being forged or fabricated, without signing on a customer's autographical signature of the sales slip. The signatureless payment settlement system has an algorithm for producing a personal authentication value in an IC chip card mounted on the mobile terminal including the cellular phone or PDA (Personal Digital Assistant), and receives a card issuing company key, card issuing information, a card password, an IC chip card produced random number to produce a personal authentication value.