Intracellular calcium oscillation with time delay and correlated noises was investigated in this paper by means of stochastic simulation. The time evolution and stationary probability distribution (SPD) of Ca 2+ concentration in the cytosol and in an IP 3 -insensitive pool were calculated. The results indicate that: (i) the intracellular calcium oscillation is suppressed with increasing the delay time τ but is enhanced with increasing the external noise intensity D; (ii) the structure of the SPD exhibits a transition from a single peak to double peaks and the biggest peak shrinks as the external noise intensity D increases; (iii) the structure of the SPD exhibits a transition from double peaks to a single peak and the biggest peak grows as the delay time τ increases.

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