A unified version of particle dynamics simulation, dissipative hydrodynamics (DHD), is proposed by selecting advantageous features of Brownian dynamics, Stokesian dynamics, and dissipative particle dynamics. A stochastic differential equation is adopted as a governing equation, and the Ito-Wiener process is incorporated to fundamentally deal with the fluctuation theorem. As a result, DHD developed in this study is free from the typical restriction that the time interval should be considerably longer than the particle relaxation time.