SUWON, South Korea—Samsung Electronics Co. plans to depend on Google Inc.'s Android mobile-device software to run future versions of its tablets, the chief of its mobile division said, as it ramps up in the competitive tablet-computer sector.

Samsung, which competes with Apple Inc.'s iPad in the tablet sector, has long been developing its own mobile-phone software, Bada, and those phones have competed with smartphones using Google's Android software. But Android has already given Samsung's smartphone...