Can Smart plug be called "smart energy device" and connect with smart energy gateway?

Hi,
Can Smart plug be called “smart energy device” and connect with smart energy gateway? and smart sensor?

if the answer is yes, what should do?

Thank you very much!

No, it is not possible to convert a standard Smart Plug device to a Smart Energy device as there is specific certification/security required for Smart Energy devices.

You might want to look into the Development kit which comes with a Smart Energy SafePlug device:

http://www.digi.com/products/model?mid=4210

You can also look into purchasing third party load controllers.

Thank your so much for your respond.
Can I demand the certification for the standard Smart Plug?

That is something you would need to pursue on your own. Digi does not manufacture Smart Energy load controllers.