The present invention relates to a sea-water and fresh-water dual-purpose spiral tube condenser equipment. It mainly comprises header clamping cap, clamping ring, header positioning seat, header, spiral tube, shell body, liquor-discharging valve, supporting seat, steam inlet pipe seat and liquor outlet pipe seat. Said invented shell body is a hollow closed cylinder body whose two ends are made into the form of sphere, and said two ends are respectively equipped with one header. The spiral tubes with two different diameters are made by gapless parallelly-coiling smooth titanium alloy tubes and mutually cover-superposed coaxially, two ends of the spiral tube are welded together with headers, and fixed in the shell body. The refrigerant is sea-water or fresh-water. Said invention is compact in its structure and is convenient in installation.