Using the quark mass density-and temperature-dependent model, we have studied the properties of the dibaryon systems. The binding energy, radius and mean lifetime of (ΩΩ) 0 + and (ΩΞ − ) are given. We find the dibaryons (ΩΩ) 0 + , (ΩΞ − ), (ΩΞ 0 ) are metastable at zero temperature, but the strong decay channel for (ΩΩ) 0 + opens when temperature arrives at 129.3 MeV. It is shown that our results are in good agreement with those given by the chiral S(3) quark model.