Earthworms has been chosen as eco tool treatment since their ability to remove organic matter in waste has been reported everywhere. Due to high content of organic matter in tofu liquid waste and relative safe from pesticides and heavy metals contaminant and because of tofu makers release in water bodies without treating, therefore we are interested to study this liquid waste as an alternative food for feeding earthworm. Lumbricus rubellus is rich available in Indonesia and only view studies use this species for dealing with wastewater treatment. L rubellus culture is potential for feeding animal and curing some diseases of human. Every week tofu liquid waste was taken for testing its pH, turbidity, CODcr and BOD5. After third week of studying there was increasing the population and bodies weight of 32% and 7.5% respectively. High efficiency removal of turbidity, CODcr and BOD5 were obtained in reactor that inhabited by L rubellus rather than without having L rubellus. Study shown that L rubellus grows faster in tofu liquid waste rather than another slurry by breaking down high concentration of organic matter in its digestive pathway use their enzymes. L rubellus produces a large number of cocoons, juveniles and granules cast appeared on the top layer of bed reactor which contains a number of organic matter eater-organism and attached as well as growth on the surface of aggregate gravels. There is possibility created between L rubellus culture farmer and tofu makers for taking mutual benefit in term of economic point of view.