Can anybody help me to build this tab in admin panel by custom module.
i want to achieve something like above picture.
You will need to create an custom module with etc/adminhtml/menu.xml.
For example
<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Backend:etc/menu.xsd">
<menu>
<add id="Vendor_Module::name"
title="Title"
module="Vendor_Module"
sortOrder="9999"
resource="Vendor_Module::name"
action="actionpath"
/>
</menu>
</config>
I suggest you look here for more info http://www.mage-world.com/blog/adding-new-menu-item-in-magento-2-custom-module.html
You can refer below link to create custom tab in Magento2 -
This module creates a Tab Menu with the logo in Magento2 admin: https://github.com/gr33nart/m2_greenart_newtab
Printscreen: https://goo.gl/YPkvn4
Below are some explanations, but in the above Github link I created a module that does this with the custom logo.
Vendor/Module/etc/acl.xml
<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Acl/etc/acl.xsd">
<acl>
<resources>
<resource id="Magento_Backend::admin">
<resource id="Vendor/Module::Module" title="TabMenu" sortOrder="0" />
</resource>
</resources>
</acl>
</config>
<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Backend:etc/menu.xsd">
<menu>
<add id="Vendor_Module::Module" title="Level 1" module="Vendor_Module" sortOrder="0" resource="Vendor_Module::Module"/>
<add id="Vendor_Module::Level_02" title="Level 2" translate="title" module="Magento_Catalog" sortOrder="10" parent="Vendor_Module::Module" action="module/index/index/" resource="Magento_Catalog::products"/>
<add id="Vendor_Module::catalog_products" title="Catalog" translate="title" module="Magento_Catalog" sortOrder="10" parent="Vendor_Module::Module" action="catalog/product/" resource="Magento_Catalog::products"/>
</menu>
</config>