There are 2 indicators of national program of iodine deficient disorder control including rate of household used iodine contained salt is 90% and above and level of ioduria of children with ages of 8-10 is 10mcg/dL and above. An investigation was carried out throughout the country. Results: the recovering level of iodine in provinces was significantly increased. The level of ioduria was improved. The morbidity rate of goiter is obviously decreased. The knowledge of women in reproductive ages for effects of iodine was improved. However, the rate of households in 9 provinces of Cöu Long river delta that used iodine contained salt is low (50%