The invention provides a bank self-service cooperation method, a bank self-service equipment assisting device, a bank self-service cooperation system, computer equipment and a computer readable storage medium, and relates to the technical field of financial equipment. The method comprises the following steps that the bank self-service equipment assisting device receives a withdrawal request sent by a client through a passbook and reads client information; a background server generates a cooperation code and effective time of the cooperation code according to the client information; the bank self-service equipment assisting device receives an cooperation code, acquires the withdrawal information input by the client according to the cooperation code, and sends the cooperation code and the withdrawal information to the background server; the background server verifies the cooperation code and the passbook password, and outputs a bill spitting instruction when the verification is successful; and the bank self-service equipment assisting device is used for discharging the bank note according to a bank note discharging instruction. The bank self-service cooperation method, the bank self-service equipment assisting device, the bank self-service cooperation system, the computer equipment and the computer readable storage medium solve the problem that the passbook client cannot withdrawcash from the ATM in the bank outlets at present, and can relieve the pressure of the counter passenger flow business without extra hardware investment of a bank enterprise.