[Abstract]From the invention of photography to the division of a series of photographic categories，such as pictorial photography，documentary photography and landscape photography，photography as an independent art has undergone a long and difficult development process.At the beginning，the main function of the birth of photography is to record the authenticity of the objective world，which can not be replaced by any other art.With the progress of The Times，people's pursuit of spiritual living standard has been continuously improved.Photography is not only for recording and souvenir as it was at the beginning，but also adds various elements like other arts -- expression of emotion，use of light，selection of composition，etc.Among these factors，emotional expression is the soul of an artistic work，and light，composition，color and other elements are the skeleton and flesh and blood of the work.Each work has its purpose and significance，which mainly depends on what kind of thoughts and themes the author wants to express and whether he can reasonably use the picture language of photography.

[Key words] emotional expression，picture，language，art creation

First，two important elements of contemporary photography -- emotional expression and picture language

Art refers to the enjoyment of beauty brought by ingenious conception through certain techniques or means.Therefore，every work of art should have its unique appeal，which is the vitality of art.[] as an independent art，photography has an irreplaceable function in expressing human emotions.The so-called photographic picture language is the composition of the work，light，technology（depth of field size）and the application of color.At the same time of creating works，the author will also have a preconception of the image in his mind，which is what is called the pre-imagination in photography.Then，through shooting or post-processing and other technical means to improve the picture in the mind，and finally form their own works.Picture language is an essential element for a good piece of work.Here，we need to refer to style，because the expression of picture language is different according to different photographic styles.

Second，the relationship between emotional expression and picture language

Before shooting photographic images，photographers will have a certain conception stage.During this process，the author will screen and process scattered living materials in his mind to create a new and complete aesthetic image system，which is the prototype of future works.Finally，the photographer USES the techniques he has learned to objectify the subject in his mind.In artistic creation，emotional expression and picture language are mutually complementary and inseparable.The expression of picture language needs the injection of the creator's soul，and the outpouring of emotion needs the accumulation of material and technical means at ordinary times.

Three，"good mood" and "bad mood" to create works are of artistic value？

In our life，when something goes wrong or something surprises us，it can bring us a different mood every day.These good or bad emotions come from our life experiences.The artistic works created by artists are an outlet and interpretation of these emotions，and these artistic works will resonate in the mind of the audience after appreciation.That is to say，"good mood" will also make the audience have a positive aesthetic feelings，"bad mood" may make us feel a feeling of depression or hesitation.Many contemporary photographic works of this kind are criticized.But is this work bad？ In my opinion，such a statement is too one-sided.No matter it is "good mood" or "bad mood"，works created by people are always the reflection of people's mind and a true reflection of an era.What has the value of the era can always arouse people's reflection.Therefore，some photos with a little "bad mood" are valuable.

Art always shows the social state of different times to people in different forms.It is a catharsis of emotion，but also a response to the real society.It is a high level of artistic creation to integrate one's own emotion into his works perfectly.No matter the works can bring "positive energy" or "negative energy" to people，as long as they can resonate with people，then the works are of certain value.Photography，as an art that can truly reproduce things，USES different techniques to create works with soul，making photography truly different from other arts.

作者簡介：

胡悦（1994.7-），女，汉族，籍贯：山东淄博人，齐鲁工业大学（山东省科学院）艺术学院，17级在读研究生，硕士学位，专业：美术，研究方向：摄影

（作者单位：齐鲁工业大学（山东省科学院））