The present application belongs to the technical field of biology. Provided is a photobioreactor used for algae cultivation, said photobioreactor comprising: a reactor main body, a separation unit, and a first aeration device. The reactor main body is a sealed irregular tubular shape, the separation unit is located within the reactor main body, and divides the reactor main body into two spaces, a left space and a right space, and the first aeration device is connected to a bottom portion of the reactor main body. Also provided is an algae cultivation system, comprising the photobioreactor, the second aeration device, and a temperature control system, and being capable of regulating the temperature of an algae solution.
