The value and significance of detective novels were mainly reflected in their exploration of the truth, revealing secrets, reasoning and solving puzzles. The reader's expectation field of view was an important element of a mystery novel. It referred to the content that the reader wanted to understand when reading a mystery novel, including the ending of the story, the ending of the characters, the answer to the puzzle, and so on. Satisfying the readers 'expectations was one of the important values of mystery novels. It could enhance the readers' reading experience and satisfaction. By satisfying the readers 'expectations, mystery novels can attract the readers' attention and increase their interest in the novel. At the same time, it can also help the readers to understand the content of the novel and enhance the readers 'understanding and memory of the novel. Of course, the value and significance of mystery novels were not limited to satisfying the readers 'expectations. Apart from exploring the truth, revealing secrets, reasoning and solving riddles, mystery novels had many other advantages, such as a compact plot, deep character images, deep thinking about the theme, and so on. Therefore, readers should not only pay attention to the characteristics of satisfying the readers 'expectations, but also consider the other advantages and significance of the detective novel.