Cysticercus cellulosae, C. bovis, and C. taiwanensis are the three species of cysticercosis of human taeniid with their adults worms Taenia solium, T. saginata saginata and T. s. asiatica respectively. C. cellulosae is prevalent in America, Europe and Asia, C. bovis in Africa, America and Asia and C. taiwanensis in Asia. The natural infection source is pig for C. cellulosae, cattle for C. bovis and pig and wild boar for C. taiwanensis. The predilection sites are muscles for C. cellulosae and C. bovis and liver for C. taiwanensis. While the prepatent periods of these three species were 60-70 days, 60-75 days and 28 days respectively. Most C. cellulosae and a few for C. bovis and C. taiwanensis survive in pig, while most C. bovis and a few for C. taiwanensis survive in cattle. In rodent, all three species have a long life. C. cellulosae and C. bovis migrate through blood and lymph vessels to the small intestinal wall and then to the body muscles while C. taiwanensis migrate through blood vessels to the small intestinal wall and then to the liver. The minimal effective dosage of praziquantel against cysticercosis should be 100 mg/kg daily for three consecutive days.