In shiitake mushrooms, the structure was better preserved in osmotic dehydration, but the osmotic dehydration may cause more damage to oyster mushroom’s structure resulting in the low density after rehydration. NaCl and CaCl2 may help in textural properties of shiitake mushrooms, but the osmotic dehydration seems to have no impact in improving the texture of oyster mushrooms. The stress relaxation quite fast and tend to reach the equilibrium stress, this mushroom are more viscoelastic solid.