1. A data accessing system, comprising: a data transmission interface for transmitting commands and data; a data storage unit connected to the data transmission interface for storing datasets, wherein each dataset has an address; a data access unit connected to the data transmission interface for accessing a plurality of datasets to the data storage unit and issuing a plurality of request instructions according to the plurality of datasets; a memory connected to the data transmission interface; a first encapsulation module disposed between the data access unit and the data transmission interface for encapsulating the plurality of request instructions into a special request instruction and transmitting the special request instruction to the data storage unit through the data transmission interface; and a first de-encapsulation module disposed between the data storage unit and the data transmission interface for de-encapsulating the special request instruction into the plurality of request instructions; wherein the data storage unit obtains and executes the plurality of request instructions to access the plurality of datasets and generates a response instruction respectively after completing each request instruction.