The invention discloses a press-formed sheet formability detection system and a method thereof, the system comprises a database unit, a sheet resistance measurement unit, a rolling amount prediction unit and an output unit, and the database unit establishes a relation between rolling amount of sheet and a sheet resistance; the sheet resistance measurement unit is used for acquiring sheet resistance data of the sheet; the rolling amount prediction unit is connected with the database unit and the sheet resistance measurement unit to calculate a predicted rolling amount by utilizing a relation between sheet resistance data application rolling amount and the sheet resistance, the output unit is connected with the rolling amount prediction unit and is used for displaying the predicted rolling amount.