A commercial washing machine that can be easily repaired and inspected and a washing method of the same are disclosed. The commercial washing machine includes a machine body for performing a predetermined washing cycle to laundry placed therein, a money depositing device mounted at one side of the machine body for allowing a user to deposit money therein, a control unit for controlling the washing cycle of the machine body, and a termination signal input device electrically connected to the control unit for allowing a signal for terminating the washing cycle in progress to be inputted thereto from the outside. The washing method includes detecting whether money has been deposited, performing a washing cycle including a washing operation, a rinsing operation, or a spin-drying operation according to the selection of a user, and terminating the washing cycle according to a termination signal inputted from the outside, irrespective of whether the remaining operations exist.