Method for writing data into storage on chip and system thereof

Disclosed are a method for writing data into a first storage on a chip and a system thereof. The method includes storing an initial firmware into a second storage on the chip, programming the first storage according to a specific data by utilizing the initial firmware, and blocking further programming operations applied to at least part of the specific data after the specific data is successfully stored in the first storage. Therefore the invention can save the external pin connections of the chip to prevent computer hackers from accessing or changing the content of the storage.