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 disposed in the accommodating space ; a transmitting assembly disposed in the accommodating space and geared into the driving assembly ; 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 , 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 disposed in the accommodating space ; a transmitting assembly disposed in the accommodating space and geared into the driving assembly ; 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 disposed in the accommodating space ; a transmitting assembly disposed in the accommodating space and geared into the driving assembly ; 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 , the at least one mixing blade is rotated, characterized in that said mixer is disposed on a top of the protrusion . <EOS>