Keyboard event on console in Golang

I'm now creating CUI based mine sweeper in Golang.
And I would like to deal with keyboard events to manipulate the game.

Do you have any idea to achieve this?

Each operating system has a slightly different way of handling keyboard presses. You could write a library that abstracts these into a common interface, or better, use one that someone else already wrote.

As mentioned in the comments, termbox-go is a good option. It's stable and has broad adoption.

Another good option is eiannone/keyboard which is much smaller, actively developed and inspired by termbox-go.

For your specific use case you'll likely want to have a go routine that's listening to keyboard events and a channel that handles them. Here's the example using the keyboard library from their documentation.

package main
import (
	"fmt"
	"github.com/eiannone/keyboard"
)
func main() {
	keysEvents, err := keyboard.GetKeys(10)
	if err != nil {
		panic(err)
	}
	defer func() {
		_ = keyboard.Close()
	}()
	fmt.Println("Press ESC to quit")
	for {
		event := <-keysEvents
		if event.Err != nil {
			panic(event.Err)
		}
		fmt.Printf("You pressed: rune %q, key %X\r\n", event.Rune, event.Key)
		if event.Key == keyboard.KeyEsc {
			break
		}
	}
}