A liquid transport method is disclosed for efficiently producing cell cultures. The liquid transport method of the present disclosure, which is in processing of cells, includes: a) a step in which a container holding a liquid is gripped by a gripping tool of a robot; and b) a step in which the liquid in the container is transported to a collection container by rotating the gripped container. In steps a) and b) the robot operates such as not to pass over a vertical line of an opening of the collection container.