For 20 years past from the date of start of space shuttle «Buran», many publications devoted both to «Buran» and to superheavy carrier rocket «Energy» which has put it in space have appeared. This rocket which engines capacity at the moment of start made 132 million kW at starting weight 2400 tn, was oustanding achievement of domestic science and technics, and by time of it creation was the most powerful rocket in the world. The cryogenic systems providing the refuelling by overcooled liquid hydrogen and oxygen of fuel tanks of the carrier rocket and orbital ship with next them thermostated keeping were also unique. Features of the cryogenic refueling systems created for these purposes are considered. Authors of article accepted a direct participation in creation of cryogenic systems from development of their outline sketches and before putting into operation.