A laminar flow device, comprising: a containing body (1; 4) separated into a first containing part (1a; 4a) and a second containing part (1b; 4b), with a surrounding wall of the first containing part (1a; 4a) having a processing window (12; 42), with a cover (13; 43) being capable of sealing the processing window (12; 42), and with the cover (13; 43) having a transparent part (131; 431), wherein the laminar flow device further comprises an air circulating unit (2; 5) received in the second containing part (1b; 4b) and configured to expel low-temperature air into the first containing part (1a; 4a), wherein the low-temperature air having a temperature between 1-8°C, wherein the first and second containing parts (1a, 1b; 4a, 4b) are separated by a partition (11; 41), the first containing part (1a; 4a) has a processing room (S1; S1') and the second containing part (1b; 4b) has a receiving room (S2; S2') in communication with the processing room (S1; S1'), and two openings (111; 411) are formed in the partition (11; 41) for airflow to pass through, wherein the air circulating unit (2; 5) comprises a compressor module (21; 51), a temperature-regulating module (22; 52) and an autoclave-sterilizing module (23; 53), which are all positioned on the partition (11; 41) and are connected with each other, with the temperature-regulating module (22; 52) arranged at one of the two openings (111; 411) to inhale the air in the processing room (S1; S1'), and with the autoclave-sterilizing module (23; 53) arranged at the other opening (111; 411) and sterilizing the inhaled air before entering the processing room (S1; S1'). a containing body (1; 4) separated into a first containing part (1a; 4a) and a second containing part (1b; 4b), with a surrounding wall of the first containing part (1a; 4a) having a processing window (12; 42), with a cover (13; 43) being capable of sealing the processing window (12; 42), and with the cover (13; 43) having a transparent part (131; 431), wherein the laminar flow device further comprises an air circulating unit (2; 5) received in the second containing part (1b; 4b) and configured to expel low-temperature air into the first containing part (1a; 4a), wherein the low-temperature air having a temperature between 1-8°C, wherein the first and second containing parts (1a, 1b; 4a, 4b) are separated by a partition (11; 41), the first containing part (1a; 4a) has a processing room (S1; S1') and the second containing part (1b; 4b) has a receiving room (S2; S2') in communication with the processing room (S1; S1'), and two openings (111; 411) are formed in the partition (11; 41) for airflow to pass through, wherein the air circulating unit (2; 5) comprises a compressor module (21; 51), a temperature-regulating module (22; 52) and an autoclave-sterilizing module (23; 53), which are all positioned on the partition (11; 41) and are connected with each other, with the temperature-regulating module (22; 52) arranged at one of the two openings (111; 411) to inhale the air in the processing room (S1; S1'), and with the autoclave-sterilizing module (23; 53) arranged at the other opening (111; 411) and sterilizing the inhaled air before entering the processing room (S1; S1').