Laser is the energy released when electrons in atoms absorb energy, transition from low energy level to high energy level, and then fall back from high energy level to low energy level. This sounds very high-end, but it is not impossible for practitioners to have a preliminary understanding. Our course is divided into two parts, mainly introducing “3D laser scanning technology” and “airborne lidar”. By giving representative examples, learners can better understand what laser is and apply what they learn. The course content is very detailed. First of all, the generation process of laser is clearly demonstrated in the way of time axis, so that we can see the continuous progress and development of laser technology. In addition, the inventor of laser technology was also deeply explained. Through this way, the audience could not only know the relevant knowledge of laser, but also understand the story and background behind it. Laser has” good directivity, high brightness, good monochromaticity, coherence and other functions”, and has a wide range of applications: industry, medicine, military, communications and other aspects. Therefore, mastering and using laser will greatly help people's employment, which is one of the purposes of this course. In the course, the teacher showed the four ranging methods of laser scanning in very strict words, and combined them with pictures and text to give students a deeper understanding. In addition, the course not only explains the basic knowledge content, but also explains its working principle in depth to solve various puzzles of students and strive to make the content comprehensive and diversified. The laser scanning system is divided into four categories, and the course is also presented in detailed language. From principle to function, each part is extremely practical. The second part of the course mainly introduces the airborne lidar data. First of all, the current situation of airborne lasers at home and abroad was explained in detail. The material resources are very professional, and the data are abundant and convincing. Next, the characteristics, system composition and functions of each component of the airborne lidar technology are also introduced in depth, and finally, the relevant products are used to wrap up. Later, the radar operation process and application fields were emphatically explained and prospected. The content is in-depth and practical. This course is very rigorous. It makes students having better understanding by clear structure, multiple forms of expression, and segmented expression of important content. Although the content is indeed difficult, it is easy to understand with the careful explanation of the teacher. It is believed that after carefully studying this course, students can really understand laser, master this technology, and increase employment opportunities and personal ability !