This paper discusses stability problem of a new stochastic predation type ecosystem with corporating a preyrefuge and independent harvesting in either species. To explore the preyharvesting and colored noises effects on the stability of the ecosystem, with the assumption of weak disturbances, the stationary probability density functions for both species were obtained by applying the Stratonovich  Khasminskii averaging principle. The accuracy of the results obtained from theoretical method was demonstrated by those obtained from Monte Carlo simulation. Results obtained show that:1) the ecosystem with smaller harvesting is less stable when the system is disturbed by noises； 2) the stronger the noise intensities are, the less stable the ecosystem will be； 3) the narrower the band width is, the less stable the ecosystem will be； a narrower band width leads to a less stable system；4) a smaller correlation time leads to a more stable system.