I would like visit big Buddha and Disneyland in 1day..which should I go 1St.?

The big Buddha area is not big.
If you plan to go the two places in one day, the Big Budda should be go first in the morning and you can finish visiting there in about an morning and then you can go to Disneyland in the afternoon. You can stay in that wonderful place for the whole afternoon and see the shows inside in the evening.