Electronic certification payment method and system

PURPOSE: An electronic authentication payment method and a system thereof are provided to facilitate payment by a mobile card issued in a smart phone during online shopping by using a desktop or a laptop. CONSTITUTION: A member store server(300) delivers payment information for an electronic transaction and access information for an authentication institution server(400) to a first user terminal(100). When the first user terminal directly accesses the authentication institution server without the member store server, the authentication institution server displays an authentication window in the first user terminal. [Reference numerals] (100) First user terminal; (200) Second user terminal; (300) Member store server; (400) Authentication institution server; (500) Push server; (600) Communication network