Improving each student's scientific literacy in an all-round way is the core concept of science curriculum. (1) The science curriculum for all students (grades 7-9) is an integral part of the national nine-year compulsory education curriculum. The Science Curriculum Standard for Full-time Compulsory Education (Grade 7-9) (hereinafter referred to as the Standard) is the basic goal of scientific literacy that students should achieve after receiving nine-year compulsory education. No matter what differences exist between students in regions, nationalities, economic conditions, cultural backgrounds, gender, talents and interests, science courses provide every student with a fair opportunity to study science, which is determined by the nature of compulsory education. Facing all students, it also means taking care of students' individual differences, so that each student's potential to learn science can be fully developed. (2) Student-oriented development of science courses (grades 7-9) is an introductory course for students to learn science, and students' scientific literacy should be comprehensively cultivated to lay the foundation for their lifelong development. Students' interest in science is the most direct and lasting internal motivation for learning science, which is very important for students' future development. In the content selection and organization of this course, starting from the students' reality, we pay attention to creating the situation of learning science, arouse curiosity and thirst for knowledge, and let students experience the fun of learning science in the process of inquiry. In the process of science education, we should attach importance to the moral elements contained in the science curriculum itself, carry out patriotism, collectivism and socialism education, as well as scientific thought and spirit education, and lay the foundation for students to form a correct world outlook, outlook on life and values together with other courses and various educational links. Science education is a dynamic process, and the educational goal should be achieved through students' independent inquiry and other activities. Teachers should play an active role in accordance with the standards and become the organizers, guides and standardizers of students' learning activities, so that students can develop their scientific literacy in the process of actively learning science. (3) Science courses that embody the essence of science should guide students to understand the essence of science initially and gradually understand that things in nature are interrelated. Science is people's understanding of natural laws, which must be tested by practice and continuously developed through scientific inquiry. Students should also be aware that science, technology and society are closely related, and science is a social undertaking that everyone should pay attention to. All these play an important role in cultivating students' scientific attitude, scientific values and good feelings for science. (D) Highlighting scientific inquiry and cultivating students' scientific literacy are inseparable from the process of scientific learning. The core of science is inquiry, and the important goal of education is to promote the development of students. Science curriculum should reflect the combination of the two and highlight the learning method of scientific inquiry. It is necessary to provide students with sufficient opportunities for scientific inquiry, so that students can experience the twists and turns and fun of the inquiry process through hands-on and brainy inquiry activities, learn scientific methods, develop the abilities needed for scientific inquiry, and enhance their understanding of scientific inquiry. Scientific inquiry is an important way for students to understand scientific knowledge, but it is not the only way. Teaching needs to use all kinds of teaching methods and strategies, so that students can connect the knowledge gained in inquiry with the knowledge gained by other ways, and lay the foundation for scientific knowledge that can be widely migrated. (5) The science that reflects the achievements of contemporary science is constantly developing and has distinct characteristics of the times. Science curriculum should reflect contemporary scientific achievements and new scientific ideas. It is necessary to let students know some modern scientific and technological knowledge that they can accept, and understand the role of modern science and technology in building new countryside, new towns and improving people's material and spiritual life, so that they can realize the close relationship between science and their own and social development, learn scientific knowledge well, improve scientific literacy, and establish the ideal of serving the society and rejuvenating China.