Abstract: The present invention provides a flash memory controller including an artificial intelligence (AI) module and a microprocessor. In the operations of the flash memory controller, the AI module receives data from a host device, and determines if the data is hot data or cold data to generate a determination result. The microprocessor is configured to selectively write the data into a first block or a second block within a flash memory module according to the determination result, wherein quantity of bits stored in each memory cell within the first block is different from quantity of bits stored in each memory cell within the second block.