It is necessary to force the system to operate in conditions to improve the utilization efficiency of the fuel cell, which corresponds to fuel cell maximum power point (MPP). According to the unique output characteristics of fuel cells, an algorithm based on the theory of maximum power transfer was developed, which was capable of tracking the MPPs of fuel cells. By controlling the DC-DC converter working at the reference current which was calculated by the real-time detection of fuel cell electric current and voltage, the fuel cell can work more stably at MPP which was located in the region of Ohm polarization. When the external environment changed, the algorithm with current type of perturbation and observation method can complete the maximum power point tracking of fuel cell. At the same time, in order to reduce the algorithm disturbance of fuel cell power, the correction was adopted in the algorithm. Simulation results showed that the control approach can yield satisfactory results under different operation conditions of fuel cell and load changes.