The concerns of climate change have forced to strengthen the regulation, standards, and certification related to greenhouse emission. These systems need a comprehensive assessment for safety and environmental impacts and should be conducted for all processes of the agricultural sector. Moreover, the assessment should include not only raw materials such as seeds, fertilizer, and pesticides but also energy, agricultural materials, and the infrastructure. In this study, we evaluate the lifecycle of environmental impacts of farming systems for a major food crop, “rice” and calculate under Environmentally-Friendly Agricultural Product Certifications in South Korea. These certifications consist of low pesticide, non pesticide, and organic systems. In addition, we compare the outputs of various environmental impacts in the U.S. and Europe. The lifecycle inventory (LCI) for all countries include the U.S. LCI database of the National Renewable Energy Laboratory (NREL), Ecoinvent of Europe, and documents from the Korean Foundation of Agriculture Technical Commercialization and Transfer (FACT) and the Korean the Rural Development Administration (RDA). The results show the followings: (1) low pesticide system, non pesticide system and organic system can reduce 14%, 30%, and 83% of total environmental implications comparing to conventional rice farming system, and (2) the comparison between Korean rice farming and the U.S. and Europe indicated that the environmental implications of global warming potential of U.S. rice farming systems is higher than Korean and European rice farming systems, about 180% and 507% respectively.