CHARGING AND DISCHARGING CONTROL SYSTEM AND METHOD, AND VEHICLE

A charging and discharging control system includes a vehicle-mounted charging and discharging module (10), a charging and discharging gun module (20), a charging connection module (30) and a discharging connection module (40). The vehicle-mounted charging and discharging module (10) comprises a vehicle-mounted controller (110) and a vehicle-mounted charging and discharging assembly (120), and the vehicle-mounted controller (110) is configured to control the vehicle-mounted charging and discharging assembly (120) to operate in a charging state or a discharging state according to a first detection parameter. The charging and discharging gun module (20) comprises a gun end control unit (210), a discharging control switch (K1), a charging control switch (K2) and a power supply module (220), and the gun end control unit (210) is configured to obtain a second detection parameter on a charging and discharging gun side, control the charging control switch (K2) to be switched on and the discharging control switch (K1) to be switched off to execute charging operation in response to the second detection parameter satisfying a preset charging condition, and control the charging control switch (K2) to be switched off and the discharging control switch (K1) to be switched on to execute discharging operation in response to the second detection parameter satisfying a preset discharging condition. Further provided are a charging and discharging control method, and a transport.