The desorption isotherms for sliced gingers fitted to the MH model, Xe = f(RHe, T) and MO model, RHe = f(Xe, T). The MP model was the most effective model to describe the mass transport behavior of sliced ginger during air drying, including the TD and HPD incorporated by the single and two stage drying. The drying constant, K in the MP model was related to drying air temperature using the Arrhenius model. The effective moisture diffusivities were in the range of 5.009E−11 to 1.735E−10 m2/s and 6.101E−11 to 1.944E−10 m2/s for the TD and HPD, respectively. The HPD incorporated by the two stage drying could reduce the drying time at 40 °C by 59.32% and increase 6-gingerol content by 6%. Quality evaluation by 6-gingerol content, rehydration and ΔE* showed the best quality for sliced gingers dried in the HPD incorporated by the two stage drying at 40 °C.