In modern society, people are suffering from more and more stress, which leads to various mental diseases. However, William Wordsworth, as a famous British romantic poet in the 19th century, had his own methods to release pressure and maintain mental health. His nature poetry is fresh and moving, delicate and beautiful, describing all kinds of beautiful natural scenery. By eulogizing the beauty of nature, we can feel the inspiration of nature to human beings, and express the poet's symbiosis with nature and his love for nature. This paper will mainly analyze the view of nature in Wordsworth's famous work “I Wandered Lonely As a Cloud”, and explore the practical methods to find psychological well-being for modern people.