The invention discloses a region power market transaction control method and a region power market transaction control system. The region power market transaction control method includes: establishing region power grid and region power market models containing distributed renewable energy and electric vehicles (EV); under the condition that V2G standby transaction rules are met, referring to the region power grid and region power market models, using total market upper-standby spare capacity requirements and upper-standby quotation provided by the EVs to form an EV upper-standby quotation curve, and using EV lower-standby charge capacity and lower-standby quotation of the EVs to form an EV lower-standby quotation curve; a region power market voidance method is set matching the EV upper-standby quotation curve and the EV lower-standby quotation curve. With the region power market voidance method, a region power market settlement mechanism is established, revenue of the region power market that DRES uses on the generating side participate in and revenue of the region standby market that EV users on the demanding side participate in are determined; the revenue of the EV owners can be accurately calculated, and safe and stable operation of the system is comprehensively guaranteed.