This paper considers the hourly passenger income of taxi and time-of-use price. The charging time cost and electricity cost are calculated. Aiming at the minimum cost of unit electricity, a charging recommendation strategy of the best time and place is proposed. Firstly, the unit time revenue of taxi is calculated according to the passenger capacity, and the charging time and time-of-use price are considered to get the best charging time. In the optimal charging period, the driving time, queuing time, charging time and unit time revenue are taken into account to calculate the time cost, and the demand power and charging price are taken into account to calculate the electricity cost. The best charging place is recommended with the minimum unit power as the goal. The simulation results show that the proposed charging recommendation strategy can reduce the charging cost of electric taxi, and verify the effectiveness of the proposed method.