Show all child terms in user page I have field in taxonomy term field_user which references to User.

At user own page (for example: user/1) I need to show taxonomy tree like this:
-user1 (this is the user whose page we are)
--user2
--user3
---user4
----user5
----user6
--etc

And if we are for example user4 page then:
-user4
--user5
--user6
--etc

It is not necessary to show current user at the tree, but it should show all terms under that user.

I'm using Views to trying to achieve this, but could not figure out proper settings for it. How to do this?
First, create a new term view using the fields row style / unformatted list of fields (it is important that the tree style not be chosen now). Then:

Add relationship for taxonomy term: parent term
Add field term id (do not use relationship) and exclude it from display
Add field term id with relationship, exclude from display
Add any fields you want to display, like term name, term description, etc...
Change style / format plugin to Tree (Adjacency model)
Set Main field to Term ID
Set Parent field to Term ID with parent relationship


For details refer 
https://www.drupal.org/node/1493366

https://www.drupal.org/project/views_tree (Compatibility and Usage)