This article discussed the manufacturer accountability from the point of view of consumer protection in two major parts. One is the concept of product defects and the other is the case study on Criminal Law. The manufacturer accountability, especially the safety issue, should be concerned over product design, production process and the following use. However, instead of intentional design, the negligence was often the major cause of the product accidents related with manufacturer, and thus the illegal behavior of individuals or enterprisers against the Criminal Law should be studied for its causal relationship and punished with clearly documented regulations.