In the recent decades, the design and development of biomimetic micro air vehicles (MAVs) inspired by bird and insect have gained increasing interest by the global scientific and engineering communities. Dragonflies demonstrate unique and superior flight performance than other flyers. They are capable of sustaining the gliding flight, and also hovering, and be able to change their flying direction rapidly. Pairs of independently controlled forewings and hindwings give them an agile flying ability. This study focuses on the effect of flapping frequency, amplitude, phase difference and angle of attack of wing on the flight aerodynamics of dragonflies. The effect of flow structure interactions between forewing and hindwing on aerodynamic forces in different flight maneuvers are explored. The present study aims to understand the underlying physics of dragonfly flight and to complete design and manufacture of a dragonfly-inspired biomimetic MAV.