The population growth rate and ecological paramenter for Moina macrocopa under different three temperature (24, 28 and 32℃) and densities of Sacchromyces cerevisiae (0. 25 X 10⁶cell. mL^-1, 2.5 X 10 cell· mL^-1 and 25 X 10⁶ cell· mL^-1) were obtained. Results indicated that the in-trinsic increase rate (r_m) reached 1.048 d^-1 under temperature of 28℃, higher than 0.76d ^-1(24), and 1. 010 d^-1(32℃). Further comparisons showed that under culture conditions that density of S. cerevisiae of 2. 5 × 10⁶cell · mL^-1 and a temperature of 28℃, the r_m was maxi-mum, the productive period and life-span, of M. macrocopa longest, and the numbers of conceiv-ing eggs highest. Hence, the conditions of culture density of S. cerevisiae of 2.5× 10⁶cell·mL^-1 and a temperature of 28℃ were optimal for M. macrocopa production. Population accumulative culture experiments indicated a peak of population density of M. macrocopa was observed at the 7th day after inoculation. The peak instantaneous rate increase of population appeared at the 3rd to 4th day, so that a collection at the 5th day would be favored.