I can access my flutter from home but cannot access from another path on Catalina OS

I can access my flutter from home but cannot access from another path on Catalina OS

here my screen shoot

and here the code

macbookpro@Cong-Fandi ~ % pwd  
/Users/macbookpro  
macbookpro@Cong-Fandi ~ % flutter --version  
Flutter 1.9.1+hotfix.6 • channel stable • https://github.com/flutter/flutter.git
Framework • revision 68587a0916 (7 weeks ago) • 2019-09-13 19:46:58 -0700
Engine • revision b863200c37
Tools • Dart 2.5.0
macbookpro@Cong-Fandi ~ %  
macbookpro@Cong-Fandi ~ % cd Desktop    
macbookpro@Cong-Fandi Desktop % pwd 
/Users/macbookpro/Desktop  
macbookpro@Cong-Fandi Desktop % flutter --version  
zsh: command not found: flutter  
macbookpro@Cong-Fandi Desktop %