For the semi-solid casting process it is very important to make high quality slurry with high speed and low cost. Recently the double-axis-electromagnetic stirrer is developed as the slurry-making tool. This stirrer has rotating magnetic field (RMF) and linear traveling magnetic field (TMF). This new technology shows several advantages in the quality of slurry. The cup design is also important to make uniform quality slurry. In this paper the new stirrer and its advantages from test report and technology of cup design is introduced.