A cup structure, comprising: a bottom comprising: a base, wherein a top surface of the base is sunk inward and forms an accommodating space; a driving assembly (300, 400, 500, 600, 700) disposed in the accommodating space; a transmitting assembly disposed in the accommodating space and geared into the driving assembly (300, 400, 500, 600, 700); and a cover disposed on the transmitting assembly and screwed on a top of the accommodating space, wherein the cover comprises: a protrusion protruded along a direction away from the cover; a water-blocking layer disposed around a side surface of the protrusion; and a mixer having at least one mixing blade, wherein a length of a projection of the at least one mixing blade vertically projected on the protrusion is shorter than a radius of an inscribed circle of a top surface of the protrusion; a body, wherein a bottom edge of the body is detachably sleeved at an outer edge of the water-blocking layer; and a top cover covered on a top of the body; wherein when a power is transmitted to the mixer by the transmitting assembly after the power is generated by the driving assembly (300, 400, 500, 600, 700), the at least one mixing blade is rotated, characterized in that said mixer is disposed on a top of the protrusion. a bottom comprising: a base, wherein a top surface of the base is sunk inward and forms an accommodating space; a driving assembly (300, 400, 500, 600, 700) disposed in the accommodating space; a transmitting assembly disposed in the accommodating space and geared into the driving assembly (300, 400, 500, 600, 700); and a cover disposed on the transmitting assembly and screwed on a top of the accommodating space, wherein the cover comprises: a protrusion protruded along a direction away from the cover; a water-blocking layer disposed around a side surface of the protrusion; and a mixer having at least one mixing blade, wherein a length of a projection of the at least one mixing blade vertically projected on the protrusion is shorter than a radius of an inscribed circle of a top surface of the protrusion; a base, wherein a top surface of the base is sunk inward and forms an accommodating space; a driving assembly (300, 400, 500, 600, 700) disposed in the accommodating space; a transmitting assembly disposed in the accommodating space and geared into the driving assembly (300, 400, 500, 600, 700); and a cover disposed on the transmitting assembly and screwed on a top of the accommodating space, wherein the cover comprises: a protrusion protruded along a direction away from the cover; a water-blocking layer disposed around a side surface of the protrusion; and a mixer having at least one mixing blade, wherein a length of a projection of the at least one mixing blade vertically projected on the protrusion is shorter than a radius of an inscribed circle of a top surface of the protrusion; a protrusion protruded along a direction away from the cover; a water-blocking layer disposed around a side surface of the protrusion; and a mixer having at least one mixing blade, wherein a length of a projection of the at least one mixing blade vertically projected on the protrusion is shorter than a radius of an inscribed circle of a top surface of the protrusion; a body, wherein a bottom edge of the body is detachably sleeved at an outer edge of the water-blocking layer; and a top cover covered on a top of the body; wherein when a power is transmitted to the mixer by the transmitting assembly after the power is generated by the driving assembly (300, 400, 500, 600, 700), the at least one mixing blade is rotated, characterized in that said mixer is disposed on a top of the protrusion.