This study examines the role of learning by doing method on skill acquisition for micro enterprises that do not have a formal academic education. The learning by doing can be able to encourage the procedural knowledge acquisition of the junior auditor. The skill required on business process can reduce the dependence of micro entrepreneur from the industrial factory. This study uses duck farmers who need fully skilled for business process completing. This study uses interview method to identify the sample’s problem and quasi-experiment method to examine the skill acquired from learning by doing and the efficiency of relationship. The examination reveals that the implementation of skill from learning by doing can significantly reduce the production cost rather than without it. This study has a contribution on the reducing of economic inequality faced by the micro entrepreneur. The result also has a contribution to the learning literature enrichment, namely learning by doing.