Portable Network Graphics

Portable Network Graphics is a bitmapped image format and video codec that employs lossless data compression. PNG was created to improve upon and replace GIF (Graphics Interchange Format) as an image-file format not requiring a patent license. The PNG acronym is optionally recursive, unofficially standing for PNG's Not GIF.

please open your Photoshop worksheet.

Open your photo to be converted into PNG format.
File> Open As 

 After something like this:

 Use the magic wand tool to select the white color background.

 Double click on the background layer, OK

 Press delete on your keyboard
White background will disappear, like this:

 Now save your picture by the way:
File> Save As> OK

 You will meet with the dialogue, do not worry ...
Fill in the name of> the content type of the PNG format

 Good luck!!