By employing the Master Equation theory,the lasing properties of the quantum dot-microcavity coupling system were studied.For different types of coupling systems,i.e.,good systemandmore realistic system,their lasing phenomenon under external pump field were investigated individually.Moreover,the influence of the detuning and the pure dephasing on internal characteristics of the coupling system,such as its second-order correlation function at zero time delay or the number of photons in cavities was analyzed....