A hookah module comprising a water jar configured to filter harmful substances from smoke, a smoke collector, and a first cup; wherein: the water jar comprises a jar body, a side wall, and a pipe disposed in the jar body; the jar body comprises a water chamber configured to hold water, a bottom part, and a first detachable connector disposed on the bottom part; the pipe comprises a first end and a second end; the pipe is disposed into the water jar with the first end exposed outside the side wall of the water jar and the second end close to the bottom part of the jar body; the smoke collector comprises a smoke chamber; the first end of the pipe is connected to the smoke collector; the smoke collector comprises a side wall comprising at least one through hole; the pipe communicates with the smoke chamber through the at least one through hole; the first cup comprises a first cavity communicating with the smoke chamber, a first end, and a second end; the first end is closed and the second end is open; and the smoke collector further comprises a bottom opening communicating with the second end of the first cup; wherein the first cup is detachably connected to the smoke collector; the first cup comprises a cup body comprising the first cavity; the second end of the cup body extends radially outward to form a first flange; and the first flange extends axially to form a first side wall in the shape of a truncated cone with a larger opening towards the cup body; and the smoke collector further comprises a second side wall in the shape of a truncated cone with a larger end connected to a lower end of the smoke collector; the first side wall is matched with the second side wall in size so that the second side wall is nested in the first side wall; and the lower edge of the second side wall abuts against the first flange. the water jar comprises a jar body, a side wall, and a pipe disposed in the jar body; the jar body comprises a water chamber configured to hold water, a bottom part, and a first detachable connector disposed on the bottom part; the pipe comprises a first end and a second end; the pipe is disposed into the water jar with the first end exposed outside the side wall of the water jar and the second end close to the bottom part of the jar body; the smoke collector comprises a smoke chamber; the first end of the pipe is connected to the smoke collector; the smoke collector comprises a side wall comprising at least one through hole; the pipe communicates with the smoke chamber through the at least one through hole; the first cup comprises a first cavity communicating with the smoke chamber, a first end, and a second end; the first end is closed and the second end is open; and the smoke collector further comprises a bottom opening communicating with the second end of the first cup; wherein the first cup is detachably connected to the smoke collector; the first cup comprises a cup body comprising the first cavity; the second end of the cup body extends radially outward to form a first flange; and the first flange extends axially to form a first side wall in the shape of a truncated cone with a larger opening towards the cup body; and the smoke collector further comprises a second side wall in the shape of a truncated cone with a larger end connected to a lower end of the smoke collector; the first side wall is matched with the second side wall in size so that the second side wall is nested in the first side wall; and the lower edge of the second side wall abuts against the first flange.