The scheduling and pricing problem of one charging station serving several electric vehicles in one area． Arrived electric vehicles ( customers) are selected and scheduled to serve from high to low sequentially based on 1) customers’total bid price for charging; 2) customers’unit bid price for charging; or 3) customers’total value of the charged electricity before the current time point． Different from the existing pricing mechanism based on the last unit electricity price， we propose the online pricing mechanism based on the average electricity price which does not rely on future electric vehicle’s charging demand． We prove that the proposed scheduling-pricingmechanism has the properties of individual rationality and incentive compatible． Comparedwith the last unit electricity pricing mechanism， it is proved thatthe proposed scheduling-pricing mechanism has the same expected customers’payment but a smaller variance of customers’payment under scheduling mechanisms 1 and 2， and has a smaller expectation and variance of customers’payment under scheduling mechanism 3． Numerical examples illustrate the effect of the proposed scheduling-pricing mechanism on reducing the uncertainty of customers’final payment for charging．