With nickel acetate tetrahydrate as raw material, and thioacetamide as precipitator and sulfur source, mesoporous NiS hollow submicrospheres can be synthesized by using one-step solvothermal method. XRD, FESEM, EDS, TEM, HRTEM, SAED, XPS and nitrogen adsorption and desorption tests, as well as cyclic voltammetry (CV), constant current charge-discharge, AC impedance, are used to characterize and test the electrochemical properties. The results show that the synthesized NiS is characterized with mesoporous and porous hollow submicrospheres with uniform size and thin shell. This unique porous hollow structure enables it to exhibit excellent electrochemical performance as a cathode material for supercapacitor batteries: with the specific capacity at 3A·g-1 current density being 155.4 mA·h·g-1, the specific capacity at 20 A·g-1 current density remaining 92.9 mA·h·g-1, the rate of retention being 59.8%, and the specific capacity still reaching 115.3 mA·h·g-1 after 5 000 cycles with a current density of 5 A·g-1, while the initial capacity retention rate being 85.0%.