INCOME TAX (Details Textual)
¥ in Thousands, $ in Thousands
 12 Months Ended 24 Months Ended
Jun. 30, 2018
USD ($)
Jun. 30, 2018
CNY (¥)
Jun. 30, 2017
USD ($)
Jun. 30, 2016
USD ($)
Dec. 31, 2008
Jun. 30, 2018
USD ($)
Jun. 30, 2018
CNY (¥)
Jun. 30, 2017
CNY (¥)
Income Tax Disclosure [Line Items]                
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential 15.00% 15.00%            
Undistributed Earnings of Foreign Subsidiaries (in dollars) $ 623,213   $ 557,093     $ 623,213 ¥ 4,089,013 ¥ 3,654,625
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent     10.00%          
Operating Loss Carry Forwards Expiration 264         264    
Withholding tax rate profits of subsidiaries earned         10.00%      
Withholding Tax On Capital Gain 3,019              
Distributed Earnings 30,190 ¥ 200,000            
Undistributed, Retained Earnings Of Foreign Subsidiaries With No Withholding Tax $ 63,716   $ 63,716     63,716    
Singapore [Member]                
Income Tax Disclosure [Line Items]                
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 17.00% 17.00%            
Operating Loss Carryforwards (in dollars) $ 34,634         34,634    
Malaysia [Member]                
Income Tax Disclosure [Line Items]                
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 24.00% 24.00%            
Hong kong [Member]                
Income Tax Disclosure [Line Items]                
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 16.50% 16.50%            
Macau [Member] | Minimum [Member]                
Income Tax Disclosure [Line Items]                
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 12.00% 12.00%            
India [Member]                
Income Tax Disclosure [Line Items]                
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 30.00% 30.00%            
QATAR                
Income Tax Disclosure [Line Items]                
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 10.00% 10.00%            
ID [Member]                
Income Tax Disclosure [Line Items]                
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 25.00% 25.00%            
Operating Loss Carryforwards (in dollars) $ 800         800    
People Republic Of China Subsidiaries [Member]                
Income Tax Disclosure [Line Items]                
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 25.00% 25.00%            
Operating Loss Carryforwards (in dollars) $ 7,994         7,994    
Withholding Tax On Capital Gain 4,784   (2,799) $ 1,252        
Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Undistributed Earnings of Foreign Subsidiaries 48,922   42,060     48,922    
Undistributed Earnings Of Foreign Subsidiaries With No Withholding Tax $ 552,937   $ 484,314     $ 552,937    
Hangzhou Hollysys Automation Company Ltd [Member]                
Income Tax Disclosure [Line Items]                
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent     10.00%          
Beijing Hollysys Company Ltd [Member]                
Income Tax Disclosure [Line Items]                
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 15.00% 15.00%            
Beijing Hollysys Industrial Software Company Ltd [Member]                
Income Tax Disclosure [Line Items]                
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential           15.00%