NextScripts on "[Plugin: NextScripts: Social Networks Auto-Poster] Blogger image not showing only url showing"

What exactly do you have in the "Message Format" field?

%IMG% %RAWEXCERPT%
%TITLE%
and when i am adding %fulltext% then image is showing....

%IMG% by definition inserts the image URL, not the image itself.

Blogger has full HTML support.

You must wrap %IMG% with img html tag.

something like:

<img src="%IMG%" alt="%TITLE%"/>