In this work, we examined the ovarian development and its relationship with steroid hor-mone receptors levels and the precocious puberty in JiNing Gray goats by using optical microscopy, immunohistochemistry, quantitative real-time RT-PCR (qPCR) and Western blotting. We found that in the ovaries of neonatal kids, high level of receptors for estrogen (ER and ER) and progesterone (PR) and their mRNA were observed along with growing follicles. From 0 to 30 days of age, the weight and volume of ovaries increased significantly and the boundary between the inner and outer cortex disappeared, while the expression of ER,ERandPRandtheirmRNAdecreasedsharply.When60daysold,theanimalsbeganto ovulate; the expression of ER, ERand PR and their mRNA significantly increased, and the animals reached puberty. On day 90, the animals manifested sexual maturity with biggest maturefollicles6.18mmindiameter,theexpressionofERandPRproteinandtheirmRNA was maintained at a high level, with decreased expression of ER and its mRNA. Before puberty, the expression of ovarian ER (prepubertal dominant receptor) and it’s mRNA was significantly higher than that of ER (dominant receptor after sexual maturity). The results showed that JiNing Grey goats’ ovaries had fast development and early maturation, and ER, ER and PR protein and mRNA expression in the ovary had distinct specificity for time and space, which may be closely related to the strain’s progenitive characteristics.