Culture method and device of photosynthetic microorganism

The invention relates to a culture method and device of photosynthetic microorganism. The culture method comprises the following steps: S100, connecting two ends of a photosynthetic reaction tube to an air source (200) and a vacuum pump (300) respectively; S200, starting the vacuum pump (300). Because pressure of the end, which is connected to the vacuum pump (300), of the photosynthetic reaction tube (100) is lower than that of the end, which is connected to the air source (200), of the photosynthetic reaction tube (100), the air introduced from the air source (200) flows along the photosynthetic reaction tube (100) and flows out the photosynthetic reaction tube (100) from the vacuum pump (300). The device is developed on the basis of aerodynamics principle, a vacuum pump is adopted to drive the air to flow and discharge oxygen gas; the culture liquid can flow back and forth, overall circular flow of culture liquid can be realized, the discharging of gas in tube and introducing of external gas can be finely