Having only 6 pins
How to control using arduino??

 

Start by looking up the part number printed on the case.

 

Hint: it is worth the search.

 

Having only 6 pins
How to control using arduino??

My guess would be that it is some kind of serial interface. You would need a datasheet to have any chance of being able to use it. Maybe something like this:

https://embedded-lab.com/blog/serial-7-segment-led-display-module-4-digits/

The above device looks like it has an SPI interface.

https://www.corelis.com/education/tutorials/spi-tutorial/