The invention discloses a culturing device, a culturing liquid and a culturing system for the external fertilization of human ovums and sperms and the early development of an embryo. The culturing device comprises at least two thermostatic culturing chambers, two small-sized air bottle chambers, a mixed gas filtering device, an air pressure protecting device, a mixed gas thermostatic preheating chamber, an air supplying pipe and the like, wherein each culturing chamber is a confined space with the volume of at least 100ml. The culturing liquid contains sodium chloride, magnesium sulfate, monopotassium phosphate, sodium bicarbonate, ethylenediamine tetraacetic acid, taurine, sodium pyruvate, L-lactic sodium lactate, glucose, gentamicin, alanine-glutamine dipeptide, 18 types of L-lactic amino acids except alanine and glutamine, and the like. When the culturing device and the culturing liquid are used, the external fertilization of the human ovums and sperms and the whole process of the development of the embryo before embryo implantation can be finished; the high-quality blastocyst forming rate and the embryo implantation rate are obviously increased.