The left figure show eigenvector and In the right figure show principal component time series in MAM the first mode show that the relation of the eigenvectors is positive over the northeastern of Thailand. But it is negative over the most area of Thailand. The values of standardized(PC’s), it was found that there was the most positive in 1997 found that It was high rainfall in the northeastern of Thailand. On the contrary, there was the most negative in 2007 found that, low rainfall in this area.