In recent years the Vietnamese economy emerges, the demand of steel grow fast ad fast, many foreign cooperation invests the steel and iron related industry to Vietnam. To avoid the steel and iron industry fall into the oversea company, the Vietnamese government take strictly controls the foreign capital to enter makes supply chain of steel industry. However, the chain of Taiwanese iron & steel industry move into Vietnam, not only may approach to customer closer, the raw materials also straight enter mainland China under the East cooperates Conformity. The Taiwanese iron & steel industry takes place of the fallen all goes to Vietnam to carry on the investment. The investment motivation is: get the economies of scale and output to the third country; Next is politics is stable and the inexpensive laborer; Again next anticipates the workshop cost for the original to be inexpensive; Finally is low for the staff rate of flow, this research induces the steel and iron industry to invest Vietnam the possible key success factor as follows to show. 1. Invests the Vietnamese government to encourage the investment the industry. 2. Cautious elects to invest the region. 3. The consideration joint capital & joint management pattern to obtain the best profit. 4. Under political condition unstable consideration, therefore, maintains the less funds quantity to be better. 5. Talented person localization. 6. Pay attention and stops the culture difference as far as possible.