Some auction systems are applied to the parking reservation system which would exert an important role in the next generation traffic systems. As an introduction evaluation of the auction systems for the parking reservation, we compare the results in case of a simultaneous auction and sequential one, and examine the influences of the strategy. Although the limited numerical experiment under the assumption that the number of parking space is only three, time zone is three, and also the total number of bidders are 25, the following results are obtained, 1) electricity trading makes a profit to both the parking manager and users 2) the average of the parking revenues would be the highest when the reservation price is a little higher than the expect bidding price. © 2012 IEEE.