A specimen processing system includes a culture vessel, a spatula, a robot, and a robot controller. The culture vessel is open on a top surface and includes a circular culture surface on which cells are culturable. The spatula includes a blade to remove the cells off the culture surface. The robot includes a hand to hold the culture vessel and/or the spatula. The robot controller includes an operation controller to control the robot to: move the spatula relative to the culture vessel with a first end of the blade on a circumference of the culture surface to remove first cells that are nearer the circumference of the culture surface; and move the spatula relative to the culture vessel to remove second cells that are inner than the first cells on the culture surface.