I try to install the image and then copy the image to eMMC, I download the emmc.sh from github. but I cannot do that.
Most resources are for other board and other processor!
Also the table link for A64 board in olimex wiki page is missing.
can any body help me about that?
You don't need to download emmc.sh separately, it is already inside the image that you downloaded to the card.
Follow the instructions from the guide here: https://www.olimex.com/Products/OLinuXino/A64/A64-OLinuXino/resources/A64-OLinuXino-quick-start.pdf
Then once the Linux boots start the emmc install script.