Abstract
Cognitive linguistics is a new discipline of modern psychology with conducts linguistic studies on basis of human experience as well as their perception and conceptualization the object world. Among matters being researched dealing with cognitive linguistics, metaphor has been dramatically taken into consideration and regarded as a specific mental mapping that provide a foundation for human thought and conceptualization. Metaphor in cognitive linguistics is divided into two types: linguistic metaphor and conceptual metaphor. In this research article, we would like to utilize the application of the theoretical system of cognitive linguistics to the research into conceptual metaphors of category denoting plants in the Vietnamese language in comparison with English language. These achievements of this article will meaningfully contribute to the process of discovery metaphor in Vietnamese in comparison with English language as well as supply more knowledge of the close relation among language-culture-thought trio.