Organic farming is recognized as an effective approach for agricultural sustainability and food safety. However, whether organic agricultural products contain more certain nutrients than conventional ones is still unclear. This paper summarized the differences in certain nutrients between organic and conventional agricultural products. Statistically, nutrients in organic products are significantly higher than that in conventional products, especially for vitamin C (V_C), mineral compounds and secondary metabolites (P < 0.01). However, it is not reasonable to conclude that the quality of organic agricultural products is higher than conventional products only based on the content of a few nutrients. The possible mechanism of agricultural system and fertilizing pattern on products quality was discussed. The nutrient contents higher in organic products primarily results from the fertilizering pattern and the slow and long-term release pattern of plant nutrients, especially for N content in fertilizers. Therefore, further research should be conducted to improve nutritional quality and taste of crop products besides high yield.