A vehicle comprising: a door sensor configured to detect opening and closing of a door; a radar provided in the vehicle and configured to acquire radar data regarding an object in the vehicle; a seatbelt sensor configured to detect a state of a seat belt provided on each seat of the vehicle; a seatbelt indicator configured to provide a notification regarding fastening of the seat belt; and a controller configured, in the following order to: control the radar in response to the opening and the closing of the door; perform a first check regarding the state of the seatbelt; determine an operating state of the seatbelt indicator to have an on-state if the seatbelt in an unfastened state; check an occupancy and an occupied position of the object based on the radar data; identify a type of the object in the vehicle based on the radar data; determine the operating state of the seatbelt indicator based on the type of the object and the occupied position of the object, wherein it is determined that the operating state of the seatbelt indicator is an off-state when the type of the object is not a human, wherein, when the type of the object is a human, perform a second check regarding the state of the seatbelt; and maintain the operating state of the seatbelt indicator in the on-state or switch the operating state of the seatbelt indicator to the off-state depending on a result of the second check. a door sensor configured to detect opening and closing of a door; a radar provided in the vehicle and configured to acquire radar data regarding an object in the vehicle; a seatbelt sensor configured to detect a state of a seat belt provided on each seat of the vehicle; a seatbelt indicator configured to provide a notification regarding fastening of the seat belt; and a controller configured, in the following order to: control the radar in response to the opening and the closing of the door; perform a first check regarding the state of the seatbelt; determine an operating state of the seatbelt indicator to have an on-state if the seatbelt in an unfastened state; check an occupancy and an occupied position of the object based on the radar data; identify a type of the object in the vehicle based on the radar data; determine the operating state of the seatbelt indicator based on the type of the object and the occupied position of the object, wherein it is determined that the operating state of the seatbelt indicator is an off-state when the type of the object is not a human, wherein, when the type of the object is a human, perform a second check regarding the state of the seatbelt; and maintain the operating state of the seatbelt indicator in the on-state or switch the operating state of the seatbelt indicator to the off-state depending on a result of the second check. control the radar in response to the opening and the closing of the door; perform a first check regarding the state of the seatbelt; determine an operating state of the seatbelt indicator to have an on-state if the seatbelt in an unfastened state; check an occupancy and an occupied position of the object based on the radar data; identify a type of the object in the vehicle based on the radar data; determine the operating state of the seatbelt indicator based on the type of the object and the occupied position of the object, wherein it is determined that the operating state of the seatbelt indicator is an off-state when the type of the object is not a human, wherein, when the type of the object is a human, perform a second check regarding the state of the seatbelt; and maintain the operating state of the seatbelt indicator in the on-state or switch the operating state of the seatbelt indicator to the off-state depending on a result of the second check.