A system and method provide a smart card-based widget service, and a smart card for the same. Status information including information about a service icon and an active status for at least one widget service embedded according to the specification of a user is set. A widget waiting screen image including the service icon of the widget service set in the active status is made and provided to the user terminal. A widget service corresponding to a specific icon is executed according to the selection of the user for the specific icon so that an execution screen image of the executed widget service is provided. A widget service for a waiting screen image is provided regardless of the type and the specification of a user terminal for the smart card. Even if the user terminal is replaced with new one, information of the smart card is maintained.