We usually give excellent documentaries a lot of praise, but sometimes we can’t explain in our words why they are good, or why they are different from other films. If fond of a film, we will care more about its images and plots, and hope that the picture will shock us, the plot will touch us. While for bad films, we can always point out a lot of problems, like the actor’s poor acting, the picture’s disharmony. As far as i am concerned, there has always been a gap between an excellent film and a bad one. In my opinion, there should be at least two essential factors for a normal level film: Integrity and balance. Integrity is one of the visual perception of importance brought to the audience, and especially matters the plot and the character. When we are not satisfied with a movie role, it may be attributed to that the performance is not real enough or the shaping of characters is not perfect enough. For a film is to put the story around us onto the screen, even though performed in an exaggerated and dramatic way for most of the time, the audience can always feel the sense of reality of the character, and the plot is of the same case. Integrity can sometimes have an influence on the balance. These two factors are interactional. The Balance is sometimes like a circle, which is complete and one of the most stable shape in the nature. The harmony between the character and the plot, the scene lighting, camera distance are some of the foundational elements for a film. Only when all part integrated in a harmonious way, can it be called a “movie”. it cannot be denied that some of the good movies haven’t been in strict accordance with these standards, but they have also be seen as successful as a large part of these directors know how to use technology and technique to retell a good story, and even simplify somewhere, achieving a better result as well. Generally speaking, only when we firstly to learn the basic knowledge, can we have a better development. An ordinary film if is compared to a wheel, that the feeling it can give to the audience is normal and plain. If a director is capable of changing the shape of the “wheel”, that it might bring a shock to the audience or on the contrary a disaster. Documentary is sometimes not so much liked by the audience, partially because it has not been much decorated and hard to bring the audience into the scene itself even though the use of some dramatic techniques and the existence of a narrator. However it is exactly its character to tell a story in a realistic way. I have a thought hasn’t been proved that for different types of documentary, we can use different processing techniques. For the documentary related to animals and people, we can use some special narrative techniques and when it is related to war and history, we can shoot in a more realistic way to make it catch up with the rhythm. Documentary is, in my view, one’s deceased father grind more capable than the film and television director, every detail is useful, no need of too much lines to cut out of a good work.