The invention discloses an indirect cooling tower based on three-tower-in-one and two-machine in one tower and a use method of the indirect cooling tower. The indirect cooling tower comprises a natural ventilating cooling tower and ten fan-shaped heat dissipater groups arrayed around a center point to form a circular ring, wherein the natural ventilating cooling tower is fixedly arranged on the top of the circular ring encircled by the fan-shaped heat dissipater groups; two flues are arranged between the two fan-shaped heat dissipater groups, which face to one side of a steam engine room, of the fan-shaped heat dissipater groups encircling the circular ring; the tail end of each of the two flues is hermetically connected with a desulfuration absorption tower; four slurry circulating pumps are arranged on one side of each desulfuration absorption tower; a steel chimney is arranged on the top of each desulfuration absorption tower; each unit is provided with a group of hot/cold water pipes; one end of each group of the hot/cold water pipe is communicated with a steam condenser of the corresponding unit, and the other end of each group of the hot/cold water pipe is in Y-shaped connection with a hot water distribution pipe or a cold water collection pipe of the corresponding unit; the hot water distribution pipe or the cold water collection pipe is communicated with the corresponding fan-shaped heat dissipater group.