Green consumption trends are changing the intention of consumers' choices and purchases. Ecological labels form the role of stimulating acts of purchasing environmentally friendly products and transmitting green product messages. Based on synthetic of intentional behavioral models and theory, this paper presents the results of an empirical study investigating the relationship between eco-label knowledge, consumer’s trust, perceived value, environmental concern, and consumer attitudes from one side and green purchase intention of agricultural products of Hanoi consumers from the other side. Correlation and path analysis are applied to analyze the data collected from the questionnaire survey in Hanoi, Vietnam from December 2018 to March 2019. The analytical results reveal the significant impact of perceived value and environmental concern on consumer attitude which leads to higher green purchase intention. This study helps to clarify new marketing forms through eco-labels, propose management solutions to governments and businesses in such developing countries as Vietnam.