Method for selectively performing handoff according to service type and system thereof

Provided are a method for selectively performing a handoff according to a service type, and a system thereof. A home agent provides a target service to a user equipment through a mobile network channel of a mobile network. The user equipment detects entering a wireless access zone of a wireless data network while receiving the target service through the mobile network channel and determines a service type of the target service. The user equipment performs a handoff from the mobile network to the wireless data network in cooperation with the home agent when the service type is a non real-time service and refrains from performing a handoff when the service type is a real-time service.